"Who I am and what I struggle with are not the same thing." (Jennifer Rothschild) Here are some "I am" statements mentioned in Believing God and Jennifer's study, Me, Myself, & Lies, to counter your negative self-talk.
I am accepted, adopted, blessed, chosen, forgiven, loved, redeemed, and sealed in Christ. (Eph 1:3-14) I am free (Rom. 6:18; 8:1). I am capable (Phil. 4:13). I am spiritually alive (Eph. 2:5). I am God's masterpiece (workmanship) (Eph. 2:10). I am welcome in God's presence (Eph. 2:18; Heb. 4:14-16). I am sheltered and protected in God (Col. 3:3; Ps. 91:1). I am precious to God (Is. 43:4). I am dearly loved (Col. 3:12). I am being transformed (2 Cor. 3:18). I am an heir of God (Rom. 8:17). I am God's delight (Zeph. 3:17). I am welcomed to draw near to God (Eph. 3:12). I am a member of God's family (1 John 3:1-2; Eph. 2:19). I am valuable toGod (1 Cor. 6:20). I am forgiven (Eph. 1:7-8). I am chosen to be fruitful (John 15:16).