Sag Ex? Stay or Go?

I dated a Sag boy for 3 years...then he asked for a break up as he felt it didn't work. After the break up, for the first 4 months, we both have new targets and dates. During that period, we did keep contact, but the conversation doesn't sound good. However, one day, he told me that he missed me a lot and when he deal with stress. Since then we gradually reunited.

But there are still ups and downs. I guess he is still searching people to date while he still go out with me and kiss/hug - and it's still ongoing until now. We argued few days ago saying that I didn't trust him but he claimed he has turned good for some reason.

My friends keep ask me to dump him as he is not as good as I thought.

But I wanna work it out and date him again...

What do you guys think..?

Thanks!