what should I do ???

My boyfriend keeps unblocking and searching his exes on Facebook . Then he gets mad at me for getting mad at him or as he says I'm acting stupid that it was 30 minutes ago and need to get over it . 😭😰 also I'm 12 weeks pregnant with his baby . What should I do any advice that would work ?? It makes me so angry , I love him but I really don't think he likes me as much as he used to let alone wants to be with me . 😭💔