I am in a new relationship, my old one lasted 7 years, after that I had plenty of sex with other men (always safe). I meet a super cute and nice guy but when we want to have sex I have difficulty getting a boner or keeping it for long. This has never happened before in my last relationship or with the countless men I have slept with. I am healthy, non smoker, 26 yr old HIV- guy. I don’t know if it’s being in a relationship with someone new that is making me nervous when we fuck or what?