Feelings fading away?

Hi everyone, I’m so lost.. so so confused.. I’ve been with my bf for about 7 months now, the first 4 months I was head over heels for him, I’d even marry him if he proposed. I’ve never started off with anyone like this well going into 6 months I haven’t been feeling the same and I can’t pin point why.. he’s constantly trying to improve himself but I’m starting to feel numb? I don’t want to regret anything, he’s amazing but I don’t understand why I’m starting to feel this way. I’m not sure how to go about this.. what would you do? We’ve been stressed financially so I’m not sure if this is what’s affecting me.. anyone pls help..