maturity and expectation

I realize that the problem is with me. i expected too much from T and at the end of the day I am going to leave this country. It was stupid of me to expect anything more than being friends and that is the difference between me, a young one, and him, an older guy, the level of maturity when it comes to relationship. Like the American I met 1 week before I leave Singapore, he said he likes me and i like him, but he never say he love me and even though we will never meet again, we still keep in contact through emails and chat, because he never expect anything more and I never expect anything from him. the difference in the level of expectation and maturity.