When the signs are there, don't discard them. Don't think it's your imagination and you are crazy. It very likely he is cheating on you. It's very unlikely that they will admit it. If you have a gut feeling, persue it because its mostly you right. Every situation is different and the experience cheaters are pretty good at it. They are careful. Tell the other woman not to wear lipstick or perfume because they'll go home smelling like the perfume. Unlikely that he'll admit. It will be lie on top of another lie and turn it on you as you're nuts. Don't let them do that to you Go with the gut feeling.