I agree. Thought of giving an answer almost like this. No need now. Great advice man, especially the do's and dont's. I'll do just what you said. Although I was tempted to take things to the bedroom if the mood was right she has offered to let the three of us stay at her apartment for the night but I'll refrain from doing so.
You might decide to keep your distance to see if your crush goes away. You might talk to your friend about what you should do. And if your friend is supportive and your crush is still going strong after a break, you may even decide to ask the sister out. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness.