I was with my ex for almost 6 months then his parents made us break up it has been 2 months and I still get jealous when I see him talking to any girl. I like someone else but I still have feelings for him. I don't know what to do.

You seem like you are very young... possibly 17-21? Anyway it is normal to be jealous in the beginning, but realize you are young and you will have many more relationships in your life... just realize that through time you will learn to get over things and see that there are others for you... in fact you should just not worry about what he is doing... worry about yourself and what you are doing in your life...

You can still love, like, and care about him.
What you MUST squash is jealousy, a horrible (albeit understandable) emotion. Doubly unfair when you already like someone else. He has every right to talk to other women (even if you were together!) so work on it.
I'm not being holier than thou - I too have experience jealousy, but we all have to separate it from the 'good' emotions of love and like, and we have to work on getting rid of it.
When he is free from parental control, you can cautiously see how he feels.
Keep in mind that unless you heard this from his parents, you don't know if he just used that reason as a gentle way of breaking up.

Could you tell why did his Parents came over to break up you two. Seems weird to me.