I love my ex so much, but he got another one so what should I do?

Same thing happen to me (I still do) I broke p with him and insitently regreted it
Maybe wait intill he brakes up withhis girlfriend
If he doesn't
I no its mean but try to break them up or becam friends with him again.
PEOPLE DO CRAZY THINGS FOR LOVE RIGHT?

Move on. Longing for someone that's with someone else will only hurt you. Do you want to wait around for years, watch him get married, have kids, and still be longing for him?

I know it's hard. It hurts. But the best thing you can do for yourself is forget him and move on with your life.

Honestly loving someone and they have moved on is only going to hurt you. You will end up happy but you have to let the past be the past and move on with your life. If that persons worth it and want you, you will be back with that person. Just know if they isn't happy with you they don't deserve you and if they happy without you, they didn't need you in the first place