Most Helpful Guy
Guys are generally friends with girls they aren't attracted to or on the flip side they're only friends to get into her pants... That's the blunt reality of 99% of it.
Most Helpful Girl
They feel comfortable talking to you about these things, they see you as a good friend who gives good advice. Basically you're in the friend zone. Stop giving guys you like relationship advice, just tell them you'd much rather suck their dicks