I'm Confused 😳 Advice Please Help

I'm a little embarrassed about the situation im in...so I have a boyfriend but when it comes to sex it's all good but after I've done it I don't feel fully satisfied I think about sexual pleasures with a girl and then I go in the bathroom to masterbate thinking of things I'd want to do with a girl I don't really know how to put it im not really open to things like this 🙈😳