Relationship anxiety

Hello, i am a female who is currently in a relationship with a guy, we've been together three months and one day (i keep count haha) and i like him a lot. The problem is, nearly everyday i get stressed out and i hate it. Little things wind me up, things that shouldn't matter, and it causes me to cause problems with me and him, not so much arguments as we never actually argue, but deep upsetting conversations that lead to him basically sucking up to me so i keep him. The things that wind me up are things like; when he takes ages to reply to my texts or messages, when he is blunt over text, he wants sex all the time, he prefers his xbox over he (childish i know haha) but face to face most of the time he is pretty perfect, apart from the fact that he is always on his phone. It upsets me a lot, and those things make me think i am loosing him, i am so paranoid its unreal that he is cheating or lying or not interested and i dont want it to end up with him leaving me cause it is annoying him too much. I think its because i have had a past of terrible relationships, leading to the guys cheating/lying and leaving me. I dont know what to do, or how to control it, please could you help?