Wrong relationship??

Hi ladies. Has anyone ever felt as though they ended up with the wrong person in life? I'm married five years now and i feel as though my heart is somewhere else. I don't feel happy in my marriage because for the first four years of my marriage my husband had been really physically, emotionally and verbally abusive to me. For the past year it's been mostly verbally and emotionally and it also turned into financial abuse as well. He doesn't allow me to buy things for myself. I feel as though I'm emotionally connected to someone else whom I've known for the past twelve years. He used to be my best friend until my husband made me cut him off completely. I miss him so much and tomorrow is his wedding and I'm so depressed and sad. He always said to me that if he doesn't get married to me then he won't ever get married. I don't understand why i feel this way...can anyone make sense of this?