why is this so complicated-?

LOng story made short:dated my guyfriend,we broke up,we spoke after 2 months of no communication between the two of us, he proposed, I accepted,next day he takes everything back even though his dad gave his blessing and I was oh yes introduced as his fiance.Anyways my friend is dating one of his friends. Not a big deal rt?Last nt I hung out with some more of his friends and his friend who is dating my friend and we talked.My friend, her guy that she is dating(ex's friend) and this other guy and I were supposed to go together to idk where.At the last moment I felt uneasy and not safe especially with all of them being intoxicated or having had a couple of drinks.Thankfully one of my friend's friend lived in the same apt complex where my friend left her car(were supp 2 ride in one car).I let them know that something came up and left.I tried to chat with my friend on Facebook but she will not talk with me.WTF?