Why am I (31F) am having bad anxiety about marrying my (31M) partner?

Seeking genuine advice. I know Reddit has a bad reputation for just advising people to breakup but I need opinions from people that have been through similar or know people that have. Can my relationship be saved???

I have been with my partner for 6 years. Last March he proposed. Right after the engagement I got severe anxiety about marrying him and went into therapy. My therapist explained that it may be something known as “the one syndrome” where women fixate on the idea of wondering if they found the one. I disagree. I am not sure what it is.

Some background on our relationship, we met in our early 20s and started dating in our mid twenties. We moved in one year after dating and during COVID he lost his income because he owns an events venue and events were banned throughout the pandemic. It was rough seeing him go through depression for 3 years. When we moved in I was paying 1/2 rent, cooking, cleaning and laundry. Our sex life was non existent because of his mental health (I’m talking twice a year) and me just being tired of taking care of him. When Covid restrictions lifted, he went back to work and his mental health got better. Our sex life never went back to what it was.

We purchased a home two years ago and he proposed last year. I have had severe anxiety about planning the wedding and we haven’t even set a date. I have not been able to make it work with him sexually. I don’t know what it is. I try SO hard and cannot physically get turned on by him. He is an attractive man but I’m not sure if the years of going through a rough patch just affected me? I feel like my body is rejecting him. We have been trying to improve our sex life to once or twice a week but I do not enjoy it. We haven’t made out in years and when we have sex I get uti infections.

Another thing to mention is that he wasn’t the nicest to me during this rough patch. He would sometimes yell at me and belittle me. We had a few couples therapy sessions and he improved his behaviour and started helping around the house and being nicer. My body is just anxious around him and it is hard to relax and accept him as a partner and marrying him gives me anxiety.

Has anyone experienced this? Please help.