I know it's hurtful and confusing when someone turns a personality/behavior flip, but you need to take care not to dwell on the guy he
was instead of the one he has become. Clearly, the new him is unacceptable to you or you wouldn't be reaching out for advice and insight.
I also know that letting go can be hard when what you used to have was good. Just because someone has changed towards you does not mean you can automatically shut your feelings off like a faucet. But -- if you continue interacting with this guy and hoping he will switch back to Mr. Nice, your self-esteem and self-respect could take a major hit. His hot/cold behavior will drive you crazy, distract you and steal your peace of mind. Don't allow this jerk to have such power in your life.
Best friend? No, best friends don't treat you this way. He doesn't want to date you right now, but doesn't want you to see others while you wait for him to get over this desire to be independent? Wow, what convenient, self-serving terms he wants you to accept. Never agree to them, and the next time he wants you to attend this or that or whatever, tell him you enjoy smart, sexy men-- not silly middle school boys. Wish him well and walk away with your head held high like a confident woman who knows what she wants -- and what she doesn't want, which is him in the form of the loser-jerk he has become.
Don't cast your pearls before swine, darlin'. You are worth so much more...guys like this can cause you not to believe that about yourself, though. Refuse him that opportunity by moving on. It may not be easy at first -- one day at a time -- but you will get there and you just don't know who might come around the corner three months from now. Don't miss seeing a prince because you still have eyes for a jester who is too blind to recognize and appreciate a great thing when she's standing right in front of him.
Take care of yourself. You'll be fine, you really will.
