My boyfriend has a new female friend he met at work, we'll call her Bev. She's nice enough and comes over quite a lot, but recently he has been staying late after work chatting with her and going places with her and not telling or mentioning it to me. Like today, I called him several times and left several messages because he had just finished work and I was nearby and needed help with our son. Literally no response so I had to deal with it by myself, then I find out he had finished work but he had gone with Bev shopping and not bothered to even answer the phone and tell me. This isn't the first time this has happened either. About half the week now he doesn't come straight home from work and goes out with her instead and doesn't even drop me a message so I know. I don't want to sound paranoid or over protective, and my partner has other female friends, I have no issue with that. But this just seems off. He'll go to the cinema with her and not even invite me, she'll come over and want to do something specifically with him that doesn't include me and i just feel kind of upset by it. Am I crazy? What should I do?