Was I Too Harsh?

To begin, the white bubble is a 15 year old who we often pick up and take with us to MANY MANY places, we pay his way for everything and never ask for anything in return. Ever. We understand that his home life is shit, so we don't mind taking him with us and making sure he and his family have food to eat. Lately, he has become very pushy about it and hasn't said thank you at all.

Note: My boyfriend and I are 22 and 20.

He called my phone repeatedly (about 20 times) asking if we would pick him up. I said we couldn't because my car is almost out of gas and we have somewhere to be where we'll make some money (opposite side of town than DaShaun's home). He hung up on me and sent me this message, which broke my heart.

But, was I too harsh to him?