Stay put. Your kids are doing well in school, and that should be your priority.
If you are having career and financial issues, then you should address those, but don’t look to your ex-husband to be your bank. Lots of people have money problems, so if you want to be specific about what you want and what you need, maybe I can help you with those. But it’s not a good idea to get back with an ex who doesn’t see your kids (who are doing well where they are), simply because you’re short of cash.
Let me know if you have any other questions. 🙂
