What is he thinking? Best friends/almost relationship in a sticky situation...?

So, I have a friend that I've known for the better part of 4 years and we've always been super close. All through high school and even through his first two years of college. Hes asked me out before, and Everyone always says how perfect we would be for each other. We love the same music, movies, etc. Have the same sense of humor, he can literally complete my sentences, and Now that I'm graduating I'm figuring out that, too late I'm probably in live with this guy. I've seen him date plenty of other women, but now I've figured out for the first time in my life that he may be the one for me, and he's now with a girl who gives it up easy, but is really sweet if completely fake. We've fought a few times in the past, seriously fought, and now we've fought again- this time, I called him up after wed hunt out and told him how I felt and we stayed on the phone for two hours admitting things we never had before, although he maintained that he had a gf, even though 'if there were any reason for them to break up, I'd be the only girl out there for him.' The next morning was the same routine, through text, because... Were of this generation. but, I finally let my emotions take hold and gave him the ultimatum because I wasn't playing second fiddle to a girl he obviously doesn't really like- that, or he's lying to me. Well, we fight and it goes from 'you're my 'ash' (his nickname for me) but she's my gf' to 'were just friends and she's my gf' well... We resolve that night that we don't want to fight, and that were both to blame for the argument. Next day, I hear nothing from him all day, from a guy i usually talk to all day everyday. Long story short, I'm hurt and I ignore him at the banquet we both go to, him with his gf me with a friend as my date. He tells his gf the next day, whom I apologize to, and him, and vise versa and we agree once again not to fight, and talk the rest of the next two days sorta like usual. Well, now he's stopped contacting and/or replying to me- and having been through this before, I assume like usual he'll be back in month or so, just when Ive given up all hope that we'll ever speak again, but this time the stakes are higher and I don't know what's going to happen, or if this is finally it. Can someone tell me what he's probably thinking? or if I'm on his mind at all? Cause he's been nothing but on mine for the past two weeks, every minute of every friggin day.