Commitment!!

Can some one clarify me what is commitment?If some one you love tells you,"I dare not put too much commitment on us",what does that suppose to be??Kinda hurt if you got that don't you feel so?At the age of 20,I guess I am a little too young to see what future I have,a bright one or I'll choose the dark side?All depend of how we judge things.How good if there is a machine here for us to view our future.Scientist,do your work!!Jajaja!
Learn not to commit to someone that is far away from you,where you can't see your future in the next ten years.Is a way to defend ownself isn't?