How do I deal with jealousy in a relationship?

So I was in a relationship a while ago with a really jealous and at the end controlling partner. Now Im freshly in a new relationship, we talked about jealousy, he's somewhat jealous, im barley jealous. My question is how we could handle that in a healthy way? I tried handling it in a "healthy" way with my ex and that ended with me not beeing allowed to talk to friends or even classmates. So while I do want to give me current bf peace of mind I don't want to fall back into beeing controlled. I would just like some thoughts on that and maby I'm just overthinking it because the relationship is still pretty new and all that