Long Distance Relationship !!!?

Okay, i’ve been in contact with this guy who lives like about 4-5 hours away from me. we met each other online. So we decided to meet each other and we did basically im in a relationship with him now.we keep ourselves in contact by phone and text messages and we were thinking we can work this relationship out and have some good time even if there is a distance problem. But lately i feel like i dont have time for our relationship because my college is starting and i work weekends plus weekdays after college. When will i have time to meet him?? And this year is so important for me if i want to get good a-level results. Its like i can only meet him in holidays…i really dont know how to tell him…i mean our relationship has only started (i’ve only met him once). I do want to see how it goes on but i really need space at this time ..and i dont have any time for a relationship especialy long distance which is like 3-4 hours.!! help how do i tell him without making him think negative .