I feel anxiety

I have a huge physical mental attraction to my fiances friend. I have issues keeping eye contact with anyone except him and I legit don't know how it's like he stares into my soul when he looks at meit's weird. And him and another friend are coming over soon (we have all been at home for weeks so none of us are sick and we all live away in the country from other ppl) .I'm gonna probably get some rather harsh or stern comments I know but I will say I would never act on the feelings I'm having right now. So please dont assume I'm going to lol