My son got a pitbull when he was in college at NC State. He got tbone when he was six weeks old in August. In December of the same year, I got tbone because my son got caught with him in his apartment. I have two boxers so he basically grew up with them but ended up attacking my one boxer. It was not unprovoked. But that is not the problem now. Tbone is now 4 years old and all of sudden has become scary. Mind you, he's a lovable dog but has severe separation anxiety but now he is showing aggressive behavior even towards my son which is strange. He lives downstairs with my son in my house and he's not allowed upstairs without my son. Lately, he just seems really hyper and aggressive. Not the loving tbone that I know and I'm now afraid of him. I don't know if this makes a difference or not but recently my son has been having a female friend come over. I don't know if Tbone is jealous combined with anxiety. I don't know what to do and neither does my son. We both love the dog very much and it would be very difficult to give him away and would break my son's heart. Last night my daughter went to open the sliding glass door to go say hi to tbone and he went crazy like he was going to attack her. Thankfully she got the door shut in time. I am open to any suggestions or help that can be given before I turn to getting rid of him. I don't want to do that. Please help..maybe someone can understand what it going on. Thank you!!!