At the end of the day, if you both truely care and love each other that much, then this shouldn't be an issue at all. Throughout life our partners are gonna work at different jobs, have different friends, have different interests, but in the long run, you can't watch over them 24/7 or be with them for that amount of time.
It all comes down to trust. I've held a long distance relationship down for a couple of years, my girlfriend went to uni for 4 of those years and i didn't, she go's out with her girly friends clubbing and has good close bloke friends, yet throughout I knew i could trust her and the fact that she wasn't with me every day, made our relationship stronger in a strange way, coz you end up cherishing the time together more. Also, giving you your own space and time to focus on things which you would like to do, and in your case, allowing you to focus on the uni work or drinking depending on what is more important to you.
Sorry I'll stop now, but to sum up on my opinion, there's no reason why the distance should be a factor at all, even if you were in London and he was in Blackpool, if you both love each other enough, you'll stay together for as long as you both want to stay together. Even when it means driving for 5 hours in traffic on a friday night 200miles when you're not feeling too good, just to see their smile and spend one day with them (god i sound like a girl). Only the two of you can make it work and i hope it does work out for you both.