I feel terrible... help?

My bf has earrings, wants to grow his hair out, and started painting his nails. I’m supporting him because it’s his choice and I don’t want him to feel like t takes away from his masculinity. Nail polish is not just for girls, but I still have a small part of me on guard saying “what if this is the start of something?” I sound paranoid but I’m scared he’s gonna start cross dressing or something.