Put this here because I am an American who was dating a Canadian so it kind of qualified for "Canada/US relations"

I know this isn't "standard" but I can really use some advice here....
Ok, where to start. Some of you that I chat with may know much of the story already, so bare with me here...
Dating a canadian has been a real trip....lol
We were together a little over a year, I've known him for 10 years prior since we were 15 and 16 yrs old....I thought I was the last person he would do this way...I guess I was wrong...
Alright, things were going good up to a point basically. We were taking things slow, just enjoying being with eachother. The chemistry emotionally and physically was amazing. He said I was the "best ever" and I felt the same about him.
Well, he never was very good about sharing feelings, it was like pulling teeth to get anything out of him. However there were times, he would surprise you and strike up the conversation concerning feelings, etc.
Like I said he told me, that I was the best all the way around, that he's never met anyone like me. He also told me many times that he had feelings for me and on two occassions that he loved me even. (However when he said the l-word he was tipsy , so I really don't take too my heart to that...lol)
However, he would always tell me that he can't totally put himself out there, in fear of getting hurt again. (His last 2 g/f's both cheated on him so he still has issues). He would always say that it was a matter of time before I found someone better than him in one of my classes or something. I got the feeling he never felt he was good enough for me or something. Like he and I were just this thing going on to pass time til I meet the real guy I want to be with. He was just waiting to be dismissed. That's what I really think he thought at times...
Well flash foward a bit, like all relationships we had problems. He would get close to me and then pull away from me. I would think "Great finally he told me how he felt and things are taking off in a good direction." Then ((POOF)) he disappears for 4 days without a word to me.
It was the little things like that, that got to me, the inconsideration for my feelings. I know I wasn't perfect by no means, but I didn't pull the crap he did.
The final straw was when he called me up to make plans for lunch at my place and did a no-show. I was furious, I could have been out getting things down but no, I sit there at my apt waiting on him to show and he never does.
So I email him and tell him that I need a break, that he hurt me etc. I was a rather angry email but by no means was I cruel on it, I felt it was fair in how it addressed everything. I asked him to not come over for my birthday because I didn't want to be let down. I told him I needed time away from him completely to think and I suggested that he do some thinking too.
That was over a month ago, I haven't heard from him since. He did call once or twice when I wasn't at home and my neighbours and I have caught him driving by my place a few times.
I have been trying to get intouch with him lately too. He has a guitar that he was supposed to have given back in an event of a break up.
I worked several extra hours inorder to get it for him. It was a $2300.00 guitar. Before I let him take it home, he and I mutually agreed that if he and I split that the guitar was going to come back to me. He said he wouldn't feel right keeping it unless he and I were together. So great, that was settled. So now since we are broken up, where's my guitar?
I've called him like 3 times and have emailed him 2 or 3 times as well....and I am getting no replies at all to anything. I don't know if he's just still upset or is trying to keep it on me.
I just don't understand why is he ignoring me, he did wrong not me, he also knows what he said to me when we made the agreement about it. So why is it so hard for him to do the right thing?
He's never been good with confrontation, he's very passive when it comes to that. His dad beat him down pretty bad as a kid to insure that. So I am thinking that is why maybe I don't know.
I am starting to get very upset. The last thing I wanted to do was pop in over at his place and argue with him seeing how he has a roommate who owns the place he lives. I have also talked to the cops about what my rights are, I know I can get it back. The cop told me that he would go over there himself and get it for me.
I don't want to go that route either, I wish he would just grow some balls and answer me back. I want to get things resolved and move on, but I can't until he and I have a face to face.
I guess I will just have to pop in then. I will try it that way first and if I don't get it back that way, then I will get the cops involved. Luckily, I was smart and kept all the receipts and even put the warranty in my name.
Some friends have told me that he might not have been into me like I thought, but I can't see that, what he said and what he did to help me at times made me think that he really cared alot...I have seen pics of his ex gf's and they aren't much to write home about, I am not being conceded at all, but I am much better looking. (His mom and sis even has said that, not to mention he always said I was the best,) His mom said I was a different level of girl than what he usually dated....she said past g/fs were happy if they had a pack of cigs for the day, that was their ambition for life..lol I am going to vet school on the other hand, so I can see what his mom means.... So if I am so "great" why was he able to give girls like that a real chance and not me?
This whole thing is really tearing my heart apart...
Any advice here you all? I am just getting emotionally exhausted with all of this?
Why do you think he's igoring /avoiding me when he KNOWS that he is the one in the wrong in all of this?