BPD husband and lack of sex

Does anyone have a partner with borderline personality disorder and have a bad sex life? I’ve read a lot of stuff about BPD to try to understand my husband more and what he goes through. But all I find is that they can have a lot of short relationships, lots of sex due to impulsivity etc. We never had problems with our sex life until something painful happened early last year and around that time I had a “friend” come stay with us who well overstayed her welcome so having her there put us off too. But now we live alone as we got her to leave because she was causing trouble and making our mental health worse. (I also have mental health issues)

He always says how horny he is and how much he wants me but nothing happens. I’m not worried about cheating or anything because I trust him and I know he only goes to work or he’s at home with me.

We’ve been together almost 4 years, got married in May and we rarely have sex. We’re only 23 and 26 too so I feel like we’re too young for this to be happening. I’m lucky if we do it once a week. We’re TTC too so it’s not helping with that

I want to know if there’s any way I can help him. I understand life is hard with BPD. I wish there was more I can do 😔

No he’s not addicted to porn and he’s never been on only fans.