Insecure for no reason?

So idk if I'm just crazy but lately I have been feeling Soooo insecure about everything and questioning my worth and beauty, and even how my half a year boyfriend feels about me, even thought we have NEVER fought and we always have a great time together. He makes me feel sexy, beautiful and safe so I don't understand why lately I've been feeling so insecure with myself. Any advice? Im literally annoying myself.