I really don't know what I am doing here but I wanted to put this out to you all. I am a father with two young children 12 and 8 and have been living with my partner for 25 years committed since we were 19. The last 6 years have been very difficult for my partner since she was diagnosed with bipolar and our relationship has been up and down with authorities involved and her moving out for 6 months. There has been numerous hospital admissions and i've tried to cope the best I can looking after the children, housework and working full-time. To cut a long story short things got better this year and she found work and got free from the house after 11 years. However after 3 months I found out she was having phone calls behind the bedroom door and then she was texting late at night. I confronted her and asked what was happening and she said she had met a work colleague who she really enjoyed talking to and they really connected. They like the same music, interests and have a passion for things that I don't have. I took it really bad and felt hurt and betrayed. I asked her what was happening and she had been meeting up for coffee on her days off and after work with him. I have since found out they go out for walks together and have met up during the day without her telling me and then going out on his birthday. I asked her what is going on and she said she is not going to talk about it and I have to deal with my insecurity. I found a letter in the bin she had written to him saying she wanted to know she liked him a lot and felt he was a humble caring man and really liked his caring touch to her. I'm doing my best to keep things together at home and look after our children, cooking, cleaning, homework, clubs and being a taxi driver to our children but it is what I signed up for. Am I a fool or should I embrace my partner to let her have freedom enough to be a friend to this man? I just am having difficulty dealing with it and my family say it is her illness and I should let her go after all I have been doing. I am not faultless and I am a typical man making mistakes and not thinking of others sometimes but my heart is in the right place and I've been committed to her for 25 years. Thank you