My boyfriend and I have been together for about 8 months and when we first got together he was able to make me come quite regularly mainly from clitoral stimulation. Since then, however, it's become more difficult for me to come with him. I started stimulating myself clitorally during sex and now I think I've made myself believe that I can't unless I do it. I've tried not masturbating so that I'm really horny when I'm with him but that hasn't worked. Recently I've been getting really close but just losing it at the last moment because I overthink and just start focusing on the fact that I need to finish. I feel really bad cause my boyfriend is so patient and giving and he'll spend ages playing with me but never puts me under any pressure either but I just can't finish and I know it makes him feel insecure. Also our sex is really really good! Any tips or help?