Teen relationship

So, I've been dating my boyfriend for a little over 2 months. Lately we have been getting into fights very easily and I feel like I just keep fucking things up. I told him before that if he's not happy with me then we don't have to stay together, but he's always telling me how amazing I am and how in love with me he is and that he would never ever leave leave me in a million years. I really love this guy but I feel like I'm not making him as happy as I used to. We are both of the cancer horoscope, so we are both very sensitive and emotional. I really don't know how to fix our fighting situation and I don't know how to keep him happy like I used to... "Advice..??"