Is it possible that a man can make you feel love and love you but cant show it?

I'm going through a situation with my boyfriend. He is battling between his ex-girl friend and myself, but he always tell me that I am where he wants to be. I can feel that he loves me but it's hard for me to determine it because it's hard for me to see it sometimes. I have seen him with his ex girl friend numerous of times but its like something just keep me hanging on to him. He has nothing to offer me, and I know that I love him for who he is and from his soul. There's nothing that I wouldn't do for him. He tells everyone how good of a woman I am to him and he always wanted a woman like his mother, but why does he drift off to the other girl. He left me about 3 weeks ago, but he stills come by my house like we are still together. He tells me that we are going to be together, but I get scared because I know what he has put me through. I love him so much. He tells me he is trying to find himself and he realizes that I am the one he wants. I pray and ask God if this is not the man for me to take him out of my heart and remove the feelings I have for him out of my life. I try to move on and talk to other guys, but it never works out with those guys and I never hear from them again. I never talk to the other guys about him so I don't know what it is. The more I pray the more I love him. He's been call to preach over 15 years ago, and I am a church going lady and the ex girl is totally the opposite. She likes to party, drink, smoke and etc. I know in my heart that he is the only I want to be with. It's like he'll tell me he's not happy with me and then it's like he keep coming back to me telling me that he's got to change because he know that I am a good woman and he don't want to loose me. We are trying to get back together and he said it's slowly progressing. What do I need to do?