This is to the creator of this thread:
Are you friends with Jess? If so, keep it that way and don't tell her that you want her or anything and that you love her. Just stay as a normal friend for her. Then i a while, maybe Dan and her will split up, and then...SHOWTIME! (Sorry Dan
Until then, man, go for number 3, yeah. If it works and you are happy, then you and her and Dan and Jess can live happily ever after.