My boyfriend and I have been together for six months and we're both 18. Is it normal for him to ask multiple times during the same day to do something sexual after I've either said no or that I'm unsure. He doesn't act on anything once I say to stop but it makes me nervous because he asks a lot. It's my first relationship and I'm just really insecure about my body, afraid i’ll regret it, or fearing how it'll go since im so inexperienced. I've talked to him about it and he has restrained himself but I still feel bad because I know he wants to do more. I feel like I'm letting fear get the best of me too ://

Any advice??