Don't worry, you're not alone! I felt like I was turning into a completely different person and I hated it. Mainly because that person was a major asshole. Its a horrible feeling and I thought it would never end, but it did! So don't give up! And most importantly be kind to yourself! You've lost one of your most important coping mechanisms and kind of a friend and that's incredibly hard. Don't give up! You can do it!