SUBREDDIT: r/relationships
TITLE: Me [21 M] with my boyfriend of eight months[23 M]I'm going abroad for almost two years for university and would like to know the best way to end things amicably.
POST: I've been with this guy since the start of the year. He's great, very smart, good sense of humour and we share a lot of similar tastes. 

We started this relationship both knowing that I'd be going abroad in September and I'm sure I don't want to go down the whole LDR thing. I tried to bring it up when I was with him the other day but he was in such a good mood and we were having a great time that I didn't want to spoil everything. My family like him very much, though I have not met his yet, but I have met his large circle of friends many times. 

How can I bring up the subject of us putting an end to our relationship and if he feels differently than I do regarding LDR how can I end our relationship amicably?
TL;DR: 
Going abroad for almost two years in Septmeber, looking for advice on how to end things sooner rather than later.