How to stop being clingy and needy😭

Okay so I’m currently 18 and 34 weeks pregnant and I live with my boyfriend and his mom. Ever since moving in with him I have become so clingy. Like I want to be beside him 24/7 and I literally get so impatient when he’s doing simple things like showering😳. He works from 3-8 everyday and the whole time he is gone I just sit around waiting for him to get back and counting down the hours. I know I must be very annoying to him and I wish I could give him space but Idk what to do with myself. I have really bad abandonment issues because my mom and dad both left me when I was very young so I’m thinking this could be the reasoning for my behavior. Like as I’m typing this I know I sound crazy but I’m just not content with being alone. I can’t stand it. I don’t have my own car so it’s not like I can just leave and do something to take my mind off of it so it just makes this 20 times worse. Does anyone have any advice? I really am scared I’m going to ruin this relationship because of it😬.