My boyfriend has just broke up with me because he just wants to be alone. What's that supposed to mean?

Anonymous
My boyfriend who I had been living with for the past 7 months has just decided to break up with me. I got the classic "its not you its me" speech. He says that he doesn't want to be in a relationship and he just wants to be alone. What's this supposed to mean? We had always gotten on well and had recently been looking to move into a new house together etc he said he would stay with me forever and I really thought he was the one, I could never imagine him cheating on me or anything. Then a few weeks ago he wanted to split up just after things were going so well. He walked out at least 2 times but always came straight back and said he loved me and wanted to sort things out. He said he didn't know what was wrong with him and that he was really sorry but couldn't help the way he was feeling. I decided to let him have his own space and went away on holiday for just over a week. When I returned he said again that he was sorry he still felt the same and couldn't help it. He has now moved out but is still in touch and wants to be friends. He keeps apologizing and saying he didn't mean to hurt me and he seems quite worried about me, he has even been in tears over everything which is really unusual for him. He talks to me now exactly the same, he is really friendly etc What is going on? Is it possible that he has found somebody else even though he says there isn't anyone and he's not interested in being with anyone right now? Is there any chance things will ever work out between us and he will come back? I'm not sure what to do right now...do I just give him his own space and try not to talk to him so much so he will miss me and come back or do I just go on as if nothings happened and be friends as I still want him to be a big part of my life. I really want him back I miss him so much already.
My boyfriend has just broke up with me because he just wants to be alone. What's that supposed to mean?
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