Sup guys

I recently visited a girl I met a few times ago in her apartment in a different city. We share what we call an "open relationship" meaning we do things couples do but without commitement. We spent 4 days together and needless to say the nights were filled with passion. However they all ended up in oral sex and handjobs, not ONCE in penetration. why? because I always lost my erection when putting on a condom which of course was quite devestating.

I believe the cause of this was hidden anxiety, like having the pressure of satisfying and performing well. The girl is significantly older and more experienced than me so might have been intimidated by it. I'm definitely attracted to her and always get erections, but when it get's serious and she wants me to apply the condom I lose it. Not entirely but enough to make penetration impossible.

I think what I need is more confidence in bed. I know that in time it will all work out and sex will just work but we already made plans to meet again and established a 100% sex chance. I really don't want to ruin it again.

Has anybody experienced something similar? How can I boost my comfortability in bed? WHat can SHE do? I don't need huge confidence boosts and the anxieties are very subliminal yet annoying. help?