Why do I feel down?

idk I finally deleted accounts, moved, and made new ones under different names and gone totally ghost. I know I kept putting myself in wierd places and know how to avoid that now and I know sooso much than I did before? But I just feel kinda sad?? or like kinda depressed? I shouldnt be and I feel like a fucking idiot and worried Ill fall back into bad habits. idk idk just thought Id feel different