Females are so very confusing to me! :O

-Sigh- It's surprising to me how much can go on without you knowing about it. To explain my story you are going to need some background information on me first. Okay, well I've never had a ton of close friends but i have a few. Lets name the first person in this story Bob (i never feel comfortable using real names). Me and Bob were very close friends a few years ago but have grown apart and i haven't talked to him in awhile, but recently began talking with again because Bob was hanging out with a group of my friends. Person number two lets name Mary (Interesting names, i know haha). Mary has known me since elementary school. Mary and I had an interesting relationship during middle school because i was a HUGE asshole in middle school (especially to her) but she always kind of stuck by me. When high school started me and Mary lost touch and only in the past year started talking again, and since we started talking she says she has fallen in love with me (i honestly have no clue how i feel about that, that is far too much for me to worry about). Mary and Bob are close friends. The last person in the equation lets name urm... Jen? Yeah, lets name her Jen. Jen moved near me from out of state a few months ago. When i met Jen she was already good friends with Bob and Mary. Jen and I had a very strange connection when we met because at first we both had crushes on each other but then we kissed and kinda realized we should just be friends. Me and Jen have been very close friends since then though, she is very nice to talk to. Okay! So now with all that seemingly random information i shall tell you what has confused me so much!

I began my school day normally. Woke up. Got on the bus. Sketched until class started. I was just being boring. I got through my first three classes and began walking to lunch. Every day i ate lunch with Bob, Mary and Jen who were all good friends. So i was just walking down the hall and i bumped into Bob who turned and looked at me. I smiled and greeted Bob and his response was to call me a bitch. I would have said something back or asked why but i think i kinda went into shock or something. So i just kind of continued on my way to lunch where i figured Mary and Jen would know what was wrong. I made it almost all the way down the hall when i saw Mary, who i ran up to and asked if she knew what was wrong with Bob. Mary ignored me. This confused me even more because usually she was all over me. So i started walking again (i don't know what else i could have done). I finally reached the end of the hall where Jen was waiting for me and i immediately asked her what the hell was going on. Jen was basically as confused as i was. Honestly I'm still confused. From what i have picked up though. Bob is upset because i "made him uncomfortable" with all my jokes. Which is totally ridiculous. Bob went on to call me self centered. Bob can kiss my ass.... anyway, i went to confront Bob about this and when i called out to him he turned around and said "I don't even want to talk to you" and walked away. So now these two people that i thought were my close friends hate me and have totally abandoned me. The funny thing in this story is that i have been able to trust the girl I've only known for a month or two more than people I've known for years. I just wish i would see it coming or have some kind of warning when girls are pissed at me. I never see it coming. One day they like me and then BAM they hate me! I just don't understand....