Advice

I’m currently pregnant. My boyfriend just left for college 30-40 minutes away and he stays on campus. It’s like his communication with me has drastically changed. I said something about it, its you going to be busy all day just let me know. But he will go an entire day without contacting me. His response to me “ thats just the way it is” Maybe I’m overreacting and just need to adjust. Anybody have a be approach on this or have some advice? I’m 18 and beginning pregnant at my age with my our first is pretty tough. But things are way off since he left.