How to find out if a boy likes you
Step 1:
Have someone abduct him by bundling him into a van. Here's a good example from the TV show Jackass guest featuring Brad Pitt:
Step 2:
Hold him in a secure location where you can interrogate him.
Step 3:
straight out ask him who he likes (he'll probably be too scared to tell you anything but the truth at this point). Make sure to keep him blindfolded while doing this.If he manages to identify you, this may affect how much he likes you after the whole ordeal.
You could just go old school and ask your best friend to ask him who he likes.
If he suspects that you've put her up to it, just flat out deny it.