In a relationship but getting curious.

I've been with my boyfriend for about a year and a half and he is amazing, so sweet and kind. I'm a pretty demanding person in terms of I'm always horny and lately I just feel like he's not cutting it, and I don't think it's because of anything he is or isn't doing, but I think there is a part of me that just really wants to talk to other girls and see how that goes. I have no idea how to explain this on here, so I haven't even tried to explain this to him. Help me ladies!