Does he like me?? or HER?

This guy and me have been friends for three years..we haven't ever gotten tgether or become a couple
friends thinks he is totally in to me..say its obvious and why cant i see it
always flirts with me...
had a few major arguments where we stopped talking for months..he came back and said he lost "someone special" "felt really depressed" "missed me" "couldnt eat/sleep/function without me"

a year back...sent me a song through which he hinted ..he wanted to define what we have..didnt think he would find someone like me..wanted to make me his
wthen he directly asked me would you like a boyfriend..(hinting about himself)...i said i like being single for now ...and independent..maybe i confused him

A couple of months later..he comes back to me and tells me about him and this girl and how they went out together she was kissing him and was all over him, told him she loved him and wanted to be with him..(desperado in my opinion)..he told her he didnt see her that way after their cinema and park date..told me he would stop leading her on and talking to her

six months laterhe tells mehe still speaks to her and she seems keen to go out with him again...i asked him do you like her he said no i dont see her that way..but she is so hot and off the scale in terms of attractiveness..and how shes got such a nice smile..to which im thinking why are you telling me

point is why is he talking to her ? if he doesnt want to lead her on and where do i stand here?? hes still keeping contact with me and going on about marriage and acting like im the only one for him

yet also keeping in contact with the "hot" girl..

the last convo we had it wasn't my smile he was talking about it was hers *frowns*
why do i want to hear that exactly? Am i his guy mate?