It doesnt matter until your cousin approaches her. Its none of your business to let her know about your cousins feelings. He is a human being and capable of doing this thing without your help, and if he does and the girl starts suffering from dilemma, then you should probably know that she isn't completely into you.
Maybe she likes you or she wants to get to know you better because she's looking out for her cousin.
You have to tell them
ew
You didn't mention how you felt about this guy. If you aren't all that interested in him then stay away and let him know you aren't interested in him. If you do love this guy then be honest with your cousin and even though she will be hurt she has to learn she can't win them all.
think of others before you
if you're cousin is looking you in you're eyes he likes you
Your cousin would flirt with your crush because: 1. your cousin likes your crush 2. your cousin really doesn't like you 3.he/she doesn't know that that's your crush 4. your cousin wants revenge 5.or another one but I don't feel it's right for me to say it
you have to sttle the dispute. tell the the truth, and if your cousin likes her to let them date. Trust me to much drama if u dont.
prob means he likes you.. ask him why he said that to your cousin
well your cousin i out of luck but because your cousin should mean more then your should maybe try to see if you can pick another girl if not he shouls understand its life
if you are dating the boy dump the cuzin but if you love this cuzin be with him just do what your heart wants