Ok. You seem to be doing things from a place of insecurity. If you work on feeling more secure in a relationship then that would help you stop being suspicious and even with the hitting. You have to find a way to build self confidence so you don't feel so emotional when you are together. If you relax and trust him it will help. You are new to relationships so it may take awhile. You are going to learn with each relationship lessons that help you in the next relationship. For now try to find comfort in a way that when you communicate with your boyfriend that you are feeling insecure.
It can help you feel better until eventually you won't need him to reassure you.