<human>: We have been together for 5 years and have a good relationship. Friends started asking about us getting married a couple years ago and I didn't think about it really until about a year ago. I don't feel excited about it. I'm not sure if I still love her, and she has told me she feels like she loves me more than I love her. I told her I don't agree, but deep down I do. I'm not sure if its just my personality to not feel as deeply or if I just don't love her like I should.

We have a good relationship, we don't argue very much, we are compatible in terms of personality and values but I feel we lack passion (she doesn't ever want sex). I haven't been the first to tell her I love her in a long time, maybe a year even though I used to. 

I fear that we are still together because I didn't bother to seriously consider whether I really want to marry her until recently. If we still had passion in the relationship, I feel we would have a decently happy marriage. I still think she's cute, but am not really attracted to her like I used to be.

What do I do?

Condense the text into a few key points
<bot>: I think we have coasted for a while and now that it's time to seriously consider marriage, I'm having doubts. What do i do?