Jokes apart not as simple as it seams

was with the ex for 10years and have 3kids together, our relationship broke down 11 months ago! Both love each other just didn't work for us! ( was still sleeping together sometimes)
I have my kids at weekends and miss them like crazy in the week when they with her

I have met somebody else a few months ago and was really happy together and have feel in love!
And about the same time the ex says she loves me and wants us to be a family together again and work out the issues we had before!
Now this is my problem always did love the ex we just had issues which made us break and also have my new partner who makes me happy and have a great time together
I do love them both in different ways
The ex has been making problems for us and playing silly games with me and friends and kids (even longer story lol) she been doing it for months and its making so may problems for my new relationship She wants to get me back
Don't know what to do anymore has all been to much since the split fighting for kids and everything else!
Family and friends all have an opinion and say whats best lol
Just wanted to here what you lot say