I am twenty years old, and for the last year and a half have been living with my bf. About a month ago he broke up with me, with reasons he won't tell me. We had a really good relationship. We hardly fought, and when we did it was normally over within twenty minutes. WE have the same sense of humor and we have so much fun together. He moved out the day he broke up with me, but half of his possessions are still here at our apartment. He moved in with his best friend. The day of the break-up, he was lending me his shoulder. So, the guy who has been there when I was sick, or had my wisdom teeth out, or needed something was there for me when we broke up too.
We see each other like every other day. He walks to my house to see me sometimes (he lives about a mile and a half away). We still act the same as if we were in a relationship (kissing hugging holding, etc.), but when I ask him if we can be together and live apart, he says not right now. We still say I love you all the time, too. I tell him I worry all the time, because he is one of the greatest people I have ever met and I don't want to lose him. He tells me not to worry, that he is still mine and if I become anyone else's then he will most likely be in jail. He has even said that he still wants to marry me, and that is something that I didn't think he was seriously considering with me yet. I have asked him if he wants to go through life without me, and he said that he doesn't want to. I have asked him if he wants to be with me, and he says yes, bt not right now. I have asked im if we will get back together, and he says most likely, but I don't know what is keeping him away. He will make comments like "If I look like that when I am that old, then I feel sorry for you" or "What do you want for your birthday (that's in Jan.)" so he still makes comments like he's going to be around in the future.
My hope is that someone can give me insight, through their own ideas or experience, in figuring out: 1) Will he actually come back to me? 2) What is keeping him away? 3) How do I act, should I keep asking him questions or just hold my tongue? 4) Is he using me? 5) How long do I give him to figure this out? 6) If we do get back together, will our relationship be better or worse than before?

I told him I will wait forever if that's what it takes. I have told him that I don't want to end up more hurt than if I had just let go in the first place. I have a lot of hope and fear all at the same time. I know we could have a great future, but I don't want to wait forever if it is not going to end with us being together. What do you think, be brutally honest, I want to know. Thank you!