Missing out??

Laura

I’ve just been thinking about how my partner the only guy I’ve done anything with and as much as I love him I’d be missing out on something if he’s the only one I ever do anything with. I don’t know how normal it is to feel something like this? I feel like I’d want to do something with someone else before fully settling down. I’ve tried to bring it up before be he just accused me of wanting to sleep with his brother. Any ideas on what I can do??