It sounds to me like he has moved on with his life without you and just hasn't told you yet. Its understandable to be busy when you've just moved to a new place, but you shouldn't be so busy that your girlfriend now just has to expect to be disappointed by you.

I think mentally it will be much better for you to end the relationship now before you let it continue like this for the indefinite future. Because let's be honest.

You've talked about it. You've had conversations. He KNOWS how you feel. He KNOWS what you're asking for to make you feel better. He just doesn't seem to really care to put the effort in without constant prodding. You shouldn't have to force your boyfriend to care about you.