We have been living together for 4 years. I have a child and everything was going well. About a year ago, half the sex was very thin for reasons unknown to me. Everything seemed to be fine and I loved myself, and sex was missing in our lives. He is always tired, falls asleep early. I thought he had another, but he gave me no reason to doubt it at all. A healthy man is 30 years old, I'm sure he's not cheating on me, I would feel it. Very strange situation. We have talked many times about what has changed, why. Maybe all couples go through such a phase. Is it normal to be together 4-5 times a month. I think I'll look for a lover. I can't take it like this anymore.