Select from options: Continue writing the next sentence.

How to deal with having a crush on your friend's sister
Take your time.
Don't rush into pursuing your feelings. Remember, crushes don't last forever.

Options: + Don't jump into it because, if you do decide to pursue your own feelings, be yourself and do it carefully. If you rush into it, the guy's already feeling the same way.. + You may feel intensely for just a few weeks about this person before your feelings begin to mellow out. If you find you still have feelings for your friend's sister after a few months, then you may wish to pursue it.. + You just need time to deal with them. Take it at face value and be open to the possibilities.. + If you feel flattered that the girl you're dating is interested in you, take it slow. Don't jump headfirst into something, or else you could scare her away..
Answer:
You may feel intensely for just a few weeks about this person before your feelings begin to mellow out. If you find you still have feelings for your friend's sister after a few months, then you may wish to pursue it.