I’m at my wits end

I (25 F) and my Fiancé (27 M) have been together for 5 years. I’m not sure how to properly articulate my thoughts so I’m going to word dump (sorry in advance). We used to have an amazing sex life. and in the last year it’s been downhill. I’ve tried date nights, making things more flirty, role play, less vanilla options and nothing is working. Recently he’s been avoiding hugging, kissing, and any form of intimacy.

we are currently planning our wedding for september 2027 which i know is a huge stressor and could also be part of the reason it’s been lacking lately. But, I’m starting to wonder if there are other reasons pertaining to this. I tried to initiate a conversation explaining my feelings and thoughts on the situation to him, but it always ends in “idk what you want me to say or do” but i’ve explained how i felt numerous times with no real difference being made. We both work full time and live together so i thought maybe work could be another reason as well. I feel like we’re still so young and have our whole lives ahead of us. I’m just not sure what else I can try doing.

support, thoughts, ideas are all welcome.