I think you have to decide what you feel is best for you. It is not fair to either person to stay just because. Do you have somewhere to go so you can think all of this over? You don't have to make any big decisions but just to really think about what you want. Wishing you the best!
counseling really helps with getting your feelings out there in a controlled way. if you want to work in it I would suggest a session or two and see how you feel. good luck
That is really tough and I'm sorry you're going through this hard time, especially while you're so recently pregnant. You need to do what is best for you. I know it's a hard decision but you can't stay just because of the kids. You deserve to be happy and to love someone with all your mite and trust someone, and to get all of that back in return. If you think these feelings may be temporary and just your crazy hormones playing tricks on you, that's one thing. But if you think you're feelings have changed for real, you should take a good long look at what you want, now and in the future. If you're fighting, that's never good for kids to be around.
Good luck and please love yourself enough to make the best decision for you.