Alone Time, NEED Advice!

My boyfriend moved about an hour and a half away, he's 19 and I'm 20 so we both live at home except during school where I live on campus. So we really only see each other in public places or with our friends and family. His parents are strict & he has 3 siblings so visiting there is difficult, & when he comes here my mom is always home. 
I'm really not sure on how we can't get privacy, it's becoming veryyy sexually frustrating and of course, to just get time to talk.Does anyone have advice? :)