So my boyfriend and I have been together for about a year now and things are starting to slow down. He's not the same from when we first starting dating. Now he's controlling and very possessive. He doesn't let me talk to any other guy friends. I'm at loss for words for the way he will act while other people are around. He will grab me out of nowhere and pull me down the hallways by my hair. What does this all mean. PLEASE HELP!
It means he is a woman abuser, and you should dump him immediately! No questions asked. Don't let yourself stay in such an abusive relationship. It will only get worse!
Being jealous is one thing, but being controlling and abusive is different.
It means he is an insecure little boy. You DO NOT deserve to be treated like that. No one does. I'm a bit shocked. What are you doing still with him if he's pulled you down the hallways by your hair?!
Unfortunately, a lot of people (male and female) behave in this jealous fashion when they're with a partner and it's all too common for their partners to just give up all their friends/family. Usually it stems from some kind of insecurity on their part. Either they've cheated themselves, or they've been cheated on before etc. Normally, steps can be taken to sort this out in a loving couple by sitting down and talking about it. Finding a suitable arrangement whereby the jealous partner is assured without their partner having to change their behavior and leave their friends/family.
In your case as your still very young, I'd personally say leave him. He doesn't sound like good boyfriend material and I repeat NO ONE has the right to treat you that way. What you describe by the hair pulling can be classified as assault!. You deserve someone better and will find him.