My wife is moving out?

Hi, me and my wife have been having problems for some time now. Some days she is really happy and others she hates me. We went away last week with a group of friends and one male she has been texting loads who is my friend has recently split from his wife went with us and she really ignored me and never stopped chatting to him. So one night I stormed of with rage and when we got back she said her mam is going away next week so she is moving her and our daughter there while they are away but won't say if she is coming back. Please help?