Can a guy fall back in love with the same person after falling out of love with her?

My bf and I have been together for 2 yrs now but our relationship has never been a happy one. I broke up with my ex then met this guy a wk later. I wasn't ready to have a bf. I made it clear to him that I didn't love him but at that time he always tell me how he was in love with me and stuff like that. he was very sweet but i never beleeived him and didn't love him at all. I did evverything to push him away. he used to cry on the phone, never eat and always had heart aches.but all the times, i tought he was playing with my mind just like my ex did. I didn't care. 2 weeks into the relationship, i slept with my ex once on him. I felt so bad and told him about it. He was devastated and that's when i knew he must really love me. I felt so sry b/c i never cheated on any guy(i'm 22). We worked it out but it's just different. Now I'm IN LOVE with him, but he told me that he truly loves me and cares for me more that he loves himself but he is not in love with me anymore. when we are on the phone he argues and says whatever he wants to mee. calls me names and make me feel bad, but when we are together, he is so nice and gentle (but not as much as he was when we first met). I'm so cofused and lost. I dn't know what to do. He always talk about marrying me and having kids with me. He calls me "queen" unless he is mad then he will call me by my name with a diff. tone. I mean what should i do? I really love him. Oh, when he is upset, he always say if u don't like it, then break up. I will always be me without u. i will party, meet other girls but i will never have a girlfriend because girls are all the same. he has nothing good to say about girls. he is always accusing me of things i don't even know about. help please..do u think i should move on (i don't even think m strong enough to live without him) or should I marry him? he said he will never stop loving me, and he wants me to be happy. but he is not in love. help