He is being helpful or chivalrous, knowing that it is difficult for someone to see or remove sand on one's own back. If he does it without you asking him, that is.
At worst, it means he doesn't find the notion of touching you disgusting and that he's willing to help you out. It may or may not mean more than that.
(This is probably a heretical notion unprecedented in the entire history of mankind, but have you considered taking the drastic step of actually, y'know, asking him if he likes you?)
he likes to hang out at the whale beach
it depends if the boy you like likes you back.
Ask him if he likes you. Or your other option is to ask him if he wants a French kiss naked OR sex on the beach. If he gets exited then he probably likes you. (Also try asking if he wants oral sex on the couch or bedroom.)
Then that is balanced. If you like a person and she likes you back, then it is balanced.
ask her if she likes you
then there is no use in liking him like someone who likes you
If your friend likes him back, back down. Risking your friendship is not worth it. If he likes you both, but your friend doesn't like him, tell him. If he ONLY likes your friend, don't do it, as he'll use you to get to your friend.
Sure, if you like him and he likes you, then go for it.
Ask her out
Only if you like her back and you like to be with her.....
you hook up the girl that he likes with the boy that she likes or you an just kill her if she likes him back BY DARK SOUL
You know he likes you back when he sticks his wanger in your hiney.