My partner left me the other day after an argument with no real reason. We have 2 children together. I haven't had any real contact with him about us, for 6 days, apart from the day he came round to look after the children while I was out. Even then he came in, as I left, and left as I came in in the afternoon. That day was my birthday. I had no card from him or present, he didn't even wish me a happy birthday. He hasn't contacted me since, not even about the children. In fact he hasn't once in these 6 days asked how they are. They only seem to exist to him one day a week, between 9 and 5. I think he may have someone else, as why else would he just leave? It is common for him to leave after an argument. He has done it 6 times so far in our relationship, but he has never stayed away for so long. His mother is talking to me about it, and him, she usually talks him round into coming home, but this time she isn't trying to. I don't really know what to do.