Advice in cumming 😳

So I been dating my boyfriend for a while now and every time we have sex He can’t make me cum (so constantly he’s always asking me have you came yet and I lie saying I have so he can finish too) I mean it feels good and all don’t get me wrong but the only one time he made me cum was because he was playing with my clit and had me reading something about sex taking headaches away. What can I do in order to come 😳 any advice