Okay, what would you guys do?

So, basically, I've had feelings for this one guy for over 5 years now. I told him when I first developed them and he avoided talking about it and got his friends to tell me he wanted to wait a few years before getting into a relationship (in all fairness we were quite young). However, when we spoke of it a few months back he told me the reason he didn't want to get together was because his best friend liked me and it wasn't his place to do anything. So, that was confusing enough. He also told me he'd have given us a chance throughout the following four years had I brought it up/been available. That's just some background. It should also be noted that this guy is undoubtedly my best friend. He's perfect to me. About just over a month ago this guy messages me on Skype saying 'Oh, and by the way, I think I like you Do with that what you will' then signs off. I text him to ask if he was kidding, he told me he wasn't. Over the next few weeks we meet up alone frequently but nothing happens. (nothing could happen, I am currently in a 2 year relationship myself. For those who might wonder why I got into a relationship when I had feelings for this guy, it was basically loss of hope with the expectancy nothing would ever happen). On a few meets he has to leave early to help out at home or whatever. One night he tells me we should discuss the potential of him and I the following day, I agreed, but on the day he didn't bring it up and I couldn't find a way to, but I didn't want to talk casually in case he thought I was avoiding it. That night he begins to ignore me. A few days later I waited for him to finish a lesson so I could speak to him about it. I asked him if I had done something, he said no and left. That night (the night before half term began so we wouldn't see each other for a week) he basically tells me he's changed his mind and that his 'feeling were only meant to uphold a strong friendship'. I was upset, but I told him that was okay. He didn't reply. That night I sought comfort from a mutual friend of ours, who thought I should know a couple of things. One, when he said he needed to help out at home, he lied. He got his sister to cover for him. Two, he sent this friend a text saying 'I don't even enjoy her company anymore'. That crushed me. The next day I asked him where that left us. He told me he still wanted to be as close as we were. He continued to ignore me after that. I received one message during half term, just him telling me he found this awkward. Since then (a couple of weeks ago) he's sent me one message (one week ago) basically telling me I was messaging him 'needy ****' and that he couldn't do this. He said we had a broken friendship. I told him I'd give him space, again no reply. Since then he's been going out of his way to avoid me - even avoiding our entire social group and skipping lessons. All I want to know is, if you were me, what would you do? Part of me wants to wait, hoping one day soon he'll speak to me and everything will be okay again; whereas part of me is also telling myself to leave him behind. I can't move on from him, believe me I've tried, but I can at least try and forget and stop tormenting myself. Any advice would be appreciated.. I'm so confused. Thanks in advance.

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