I know you have feelings for this guy but your needs are not being met. If he's not interested in furthering your relationship, you're wasting your time. I get it feels good you're getting some attention from him. Maybe now is the time that you cut him off. He wants someone there for his surgery? Find a friend. Don't let him take advantage of your niceness. He knows you have feelings for him but is stringing you along, anyway. That's not right.

He has been clear to you, though. He's not at all interested in you in a romantic way. Has he ever been in a romantic relationship? That's why I asked if he's asexual. Or, is he waiting for another woman to take your place but hasn't met her yet?

Something needs to give.

If you know he's not interested and you're wanting a relationship with him, you're just banging your head on the wall.