Boyfriend Graduating

So me and my boyfriend have been dating for 3 years, this year is his senior year and my junior year. I know he still has a full year of school to go but I’m so nervous about him leaving for college. He wants to go to school that’s about 4 hours away and he says he’ll see me all the time and he’ll come home on the weekends. To me that’s not realistic because he plays sports, studying and I work. I just worry about him meeting someone new and leaving, I know that sounds childish but honestly that’s just one of my fears. Any advice would help!