Does he still love me...?

[StarGazing]

My BF and I have recently bought a house together, and at first there was a lot of fighting and stress. Things have gotten more to how they were before we did this, but I don't feel like I want to be as close to him anymore, and I think I'm starting to fall out of love with him. He proposed to me over 3 months ago after drinking one night, saying he was being serious then took it back because he wanted it to be nicer for me. Whenever I brought it up, he snapped, and later would apologies and recently said he wanted to ask my mum, and talk to his parents first. The thing is, he doesn't believe in marriage, and says he wants to because he knows it will make me happy. I feel like if he loved me he would have asked me by now, and would truly want to because of how he felt towards me. He has a lot of hobbies I'm not really interested in, although I really do try to be interested. I'm finishing uni soon, and am worried that I'm a different person and that he might not be my soul mate. I don't know what his reaction would be if I told him this. I ask him if he still loves me and he says yes, and says it hurts when I ask but I feel so empty at times. He never seems to want to kiss me anything more than a peck, and when I mentioned this to him he said he hadn't realized and kissed me properly a couple of times after over the next few days. I just feel like being distant from him for a while to see if he does want me, or try to be closer. I don't know what to do, and I feel very conflicted. It is fair of me to feel like this, or am I being a horrible person. I really believe in being honest, but I don't know how to express my feelings to him. He also referred to our relationship as being like 'best friends' like how we talk to each other, not like some married couples who talk to each other weirdly *that's how he explained it* at first I though this was a good thing, but now I'm not so sure... I always thought my soul mate would admire me in a more romantic way, not consider the way we interact a kind of friendship...
We will be together 6 years in May