My Girlfriend is making me go crazy

I am in a relationship with my girlfriend from last 3 years. We both love each other a lot but nowadays she is coming up with some nitty-gritty issues which is driving me crazy. She has lot of friends and once in a while she asks me to accompany her to some parties at her friend's places. She introduces me to her friends and when I try to talk to any of them(....i mean girl), my girlfriend stares at me like I have done something terribly wrong and now I am liable for a death sentence.

Is it just me who is overreacting?

Few days ago, I saw my husband to holding my sister from behind,  with his hands around her waist area. I mean to say type of cuddling. I really found this very inappropriate because he only does that to me and I think it is type of gesture of affection towards a wife.

My boyfriend hits me, is it my fault?

I dont know if I deserve to be treated this way or how to react to , and why do i feel like i deserve it.First, i have a drug addiction problem and have been trying to get help for some time now, i need to tell you that so you get both sides. Now i did just found out im pregnant as well.

Big problem, please help!

Ok well i am 15 and there is this one main girl that i fancy, but there are a few problems.
1.she is 2 years younger than me at school.
2.i have never spoken to her in my life.
3.she is quite popular in her year.
4.i am very shy, and i mean very shy at school.

Plz advice me on this. ..Dating advice

Hey guys.

I am a 19 year old female. I am on a gap year in New Zealand at the moment. I have gone to a course at uni for 3 months. At this course there is this guy i really have a crush on. He is cute, kind ... However we never really talked. I am leaving in 6 weeks, however coming back in 1 year. I really wanna let him now that i like him, as this thursday will be the last day at Uni. I have written this letter to him.