I'm so lost and sad right now

I got married about a year ago to a man that's like my best friend. Problem is I hate sex and it makes me panic, feel threatened, etc. and if I turn him down he feels rejected and hurt and unloved. We do have sex, maybe once every week or two, and sometimes I'm into it, but more often I do it to try to make him happy. I don't know what to do. I dearly love this man but I feel obligated to have sex and it makes me panic and freak out and I'm taking way more meds after being married than before. He's miserable the way our marriage is with my lack of sexual interest, which puts more pressure on me and just makes me shut down even more. I've been doing nothing but cry the last two days. I have a great therapist but I don't know how that will ever make me want sex like a normal person.