I don't know what to do...

So me and idk what to call us right now of a boyfriend are going through a tough time right now... we are trying to work things out slowly and take care of our personal issues professionally. Well yesterday we planned on hanging out tonight around 6 or 7 just to talk and see each other. Well it's now 9 and I haven't heard from him since 3:30. I've sent numerous texts and called probably 50 times. And the crazy girlfriend that I am drove by his house to see if he was home and he wasn't, so I drove by his best friends house and there he was. He doesn't drive but his best friend is with him EVERY night and when it rains or it's too hot they go to his house and it just so happens to be raining. I know he's not messing around with no other girls cause nobody wants his dumbass except me. But this upsets me, why couldn't he have let me know he would of rather went to his friends? Instead just ditched me. My heart is so broken and I don't know what to do, I love him so much and I'm pregnant with his baby. Am I overreacting?