Im A Catfish, What do I Do?

So me and this guy met on a game and we've been dating on and off for 4 months. Around when we first met he asked for a picture and i just searched up a random girl off instagram I wanted to keep my identity safe, but i feel soo freakin dumb I really can't believe I did that. And now he's asking me to facetime and stuff. I really didn't think it would go this far, and I really want to break it off but im really scared and I dont know what to do. I really love him and he loves me too. I just dont want to hurt him. What should I do?
Im A Catfish, What do I Do?
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