PLEASE TELL ME WHY HE ASKED ME THAT???...PLEZ ANYONE! BEST REWARDED**?

My inturpitation of it is that this guy really likes you and when he said 'There for him' I think he was question-ing whether you are with him or see him alot to be there for him. I think he was testing the waters to see if you like him or someone else. Hope I helped. =D