For fucks sake, do not indulge this “crush”, dude. I’m gonna assume you don’t have close contact with many women who are nice to you, and you are confusing her familial kindness as potential for romance. Before you make a move on your cousin, make sure you can bang someone who is NOT your cousin. Heck, go bang a hooker. If you feel the same “crush” on the hooker that you for your cousin...it ain’t anything more than your dick steering the ship. Don’t let your dick steer the ship into a massive family problem. You will never live that down. Even if she wants to fuck you, it’s more trouble than it is worth. You are not experiencing true love. You experiencing lack of pussy options. The solution is increasing pussy options. The solution is not fucking your cousin.