my dear, your friend sounds just like one I had a few years ago.
Since I have always been a very encouraging type friend, it took me a while to finally realize i was in a relationship with a sponge.
Someone that soaks it up and doesn't give much of a drip back!
I don't say this easily, trust me.
I had to walk away from the friendship and that was a first for me.
A year and a half later we tried it again...I know...how silly of me, right?...nope, listen to your gut the first time and save yourself the bother of a one sided thing that will suck the life out of you eventually.
So sad, that some ppl don't realize how much there is to be gained in life, if your only willing to reciprocate. They end up losing out on a lot. It starts out with a bang, but ends up being the sound of a flat tire. so sorry.