I currently in a relationship that I have been in for two years. For the first year or so we were pretty sexually active, as in at least a couple times a week and as of the last couple months or so we are sexually active maybe once or twice a month. This has made me think about the possibility of him cheating on me. Because there was an incedent at the very beginning of our relationship where some might say he did cheat on me.. can someone tell me if I'm being irrational about this? I don't want to accuse him of something he's not doing but what changed?   In every other aspect of our relationship is just fine. And I don't mind not being sexually active  as often.. but it just makes me think.