Do I leave or stay?

I was married for 12years, had two kids then divorced. A year later I met my current boyfriend. We have been together for over 5 years. We have one child together, plus my two and his four. Its been a very rocky 5 years with lots of kid drama and problems. Our relationship changed drastically when I became pregnant with our daughter. We hadn't planned on having anymore kids. Anyway, we are good friends, we do our best to be supportive to each other in raising our kids. But we have no sexual relationship. I've been seeing someone else off and on for about a year. No this other guy has left his wife and wants us to get together. I just don't know what leaving my boyfriend will do to our kids. They know we aren't happy together, but we don't fight and there is no abuse.

You need to sit down and talk this through honestly and calmly with your current partner (and with your children if they are old enough). Your partner can't be happy either as there seems to be no longer any romantic love between you. If you are friends, then you should be able to come to an amicable solution. You didn't say how you felt about your new lover - don't use him as an escape route unless you have deep loving feelings for him. You must only do things and make decisions out of love, not need or it will all backfire on you.