should I do? I had a mutual crush on a co-worker. After some time of flirting I told him I was attracted to him. We flirted more here and there at work and hanging out. Eventually we had casual sex and he was unable to "perform" fully. I assured him that it was okay. But after that he backed off. Since then I've developed feelings for him. Should I tell him how I feel? Or was he just in it for the sex and I should just forget about it?