Leave always in good. As you said, small enough field always means "you'll meet more than once. I wouldn't say because of XXX. I would tell them some personal

Leave always in good. As you said, small enough field always means "you'll meet more than once. I wouldn't say because of XXX. I would tell them some personal reasons, like "want to develope myself..." "some personal changes happend.. and ..." let them feel good, and especially, that one guy. You'll need some help some day, dont build a Wall.