Boyfriend doesn’t express feelings

I have been dating my boyfriend for 7 months and I love him very much. He has not said that he loves me. I also say nice things to him like I am very thankful for him and that he is my favorite person and he never says anything back to me, just silence. I asked him about this, the lack of emotion, and he says other girlfriends have had issues with this in the past as well. I don’t want to have a manual for him so I never say anything that that hurts my feelings or that I am feeling insecure in the relationship or that I would like him to tell me how he feels about me. My lack of knowing how he feels gives me the feeling that I may get dumped at any point in time because he doesn’t have feelings for me. Its just kind of an eery feeling like im always waiting for the other shoe to drop. I have been dumped out of the blue about a year ago and it was very painful and im just worried its going to happen again. I don’t want to be a naggy girlfriend and ask him how he feels about me all the time but I do want to be in a relationship where the other person loves and cares about me and I don’t know if he does. how do I manage this? I feel like I need some reassurance so I know where I stand.