Advice on how I could possibly be feeling

I’ve been dating my boyfriend for almost 4 years we have been dating since we were 14 (now both 17) at long distance I love him with all my heart but sometimes we have some communication issues mostly arguments start by me because I’m frustrated that we can’t see each other as often and our parents are strict and won’t allow us to be alone until we’re married but we have already had sex . Besides this point at times when I need reassurance I’m too embarrassed to communicate it to him , and it ends up in a big argument because I’m mad that he can’t read my mind which I recognize it’s a toxic trait and I can do better but I don’t know how to communicate myself to help him understand I end up chickening out and not saying much when in reality I had to say much more but I just feel ashamed , my boyfriend is a good person he has matured so much in these years that we have been together and I don’t wanna mess it up can someone please tell me what I can do to not feel ashamed , has anyone ever been through this ?