I like you, but I have a plan to leave the country with a friend in 2 yrs

So I have been dating this guy for about 4 months and finally had the talk about being exclusive. He said he's not dating anyone else, but made a pact with a friend 5 yrs ago to pick up and travel the world.  He dated her and it didn't work out. Asked if he's sexually attracted to her and he said no. He goes on a trip with her every year, too. He said he doesn't know if it will actually happen but thought I deserved to know which I respect. He also said how much he likes me and glad he is that I'm in his life. But I'm not sure how to feel about this wasn't expecting it. Thoughts?