Making Me Sane

He was my boyfriend. My rock. The love of my life. She was my girlfriend. My love. My everything. He abandoned me. I walked away. I hate him, but I love him. I love her and have nothing but regret for letting her go. He caused me so much pain; I just can't trust him. I can't live without her. I will earn back her trust. He's drawing me in but should I stay? I'll fight for her with everything I have. Is there a chance we can go from driving each other mad to making each other sane?