Guy Help || (my best friend)?

i meet this guy 2 years ago, i liked him right away. I didn't let him know it though, it turned out he liked me ,too. So we started talking but then we got in this big fight, and ever since then we haven't been as close, but we're still like best friends. He's the one i always call when i'm upset and he always makes me forget about it. He's the first guy i ever told i loved, and he's the only one i ever really have. I want to get him back-really bad. I've kinda messed up big time- i hooked up with one of his best friends, and i hardly knew him. He said he forgives me-- but he keeps messin with me about it. I really wish i hadn't have done it, but it opened my eyes to the fact that i need to straighten up! It's a messed up sitution- i want him more than a friend.....any advice how to do so??