I had them on my head just above the hairline on my forehead. While you couldn't see them, I wasn't allowed to wash my hair for 3-4 days, and I had very oily hair back then. I rinsed the back of my hair out, but my bangs were gross. And I couldn't wear a hat because of where the stitches were. It was not pretty but I got through it.
Play the sympathy card. Instead of thinking you will scare your crush off, think about how your crush can try to take care of you instead. And frankly if a few stitches scares anyone off, they aren't worth your time or your affection.