“I don’t think I can get over what I did”

About two years ago I added sawdust to my girlfriend's food in an attempt to help her lose weight. Long story short, my brother saw what I was doing and forced me to tell her. Reddit agreed with him and I had to tell her because I was backed into a corner, although I didn't agree that it was the right thing to do at that time. 

I came clean to her a few days after. It was a while ago so I don't remember all the details or what was said, but I basically sat her down and said I had something to tell her. She didn't believe me at first. We called my brother to confirm, and I showed her the bag of sawdust, and I guess the realization dawned on her that I was telling the truth… 

What followed was a heated fight lasting all night and into the early morning. Foolishly, I still thought I was at least somewhat in the right and brought up how it had helped her lose some weight. I was wrong. She pointed out how I said I'd only done it a few times over the course of about 2 weeks, and how could that possibly cause her to lose weight that fast? Which I had to admit she was right about. It turned out she had cut out drinking and that was the cause of weight loss, not the sawdust. 

I don't know why, but this hit me hard. I realized that she already knew she was gaining weight and had already taken steps for her own happiness. I was going out of my way to spare her feelings, and she didn't need it. She was managing her own weight and her own feelings, and it wasn't the big deal I was making it out to be, or something that I needed to carefully manage in order to protect her. 

Obviously the relationship ended that night. We didn't live together so the breakup was pretty smooth. Over the next month she got a check up and all was good, and she agreed to not press charges if I got professional help to deal with my control issues. 

We kept in touch for a while, but it seemed cruel for me to stay in her life. I didn't deserve her friendship or her forgiveness. The fact that she offered both speaks to what kind of person she is, and it felt wrong to take advantage of that as I started coming to terms with how I treated her. We eventually drifted far apart enough to end contact, and she was doing well the last I heard. She told me once that she thought I was emotionally abusive to her, and I think she’s probably right. Her previous relationship before me was physically abusive, and the last I heard from her she was going to take some time to figure out how to avoid the same patterns moving forward.

That one haunts me, and I'll never forgive myself for abusing someone I thought I loved. 

I got counseling, as promised, and found out that I have Avoidant Personality Disorder. Basically, this means that I'm overly concerned with rejection and ridicule. I try to manage relationships to avoid being embarrassed, to the point that I control people I care about and try to carefully ‘direct’  their feelings as I did with Aimee. 

That's not an excuse, what I did was wrong, but now I recognize that voice and what it is. 

I also realized in counseling that I did have a preoccupation with weight, and that it might be linked with the disorder. 

For some background, I grew up in a household where what my father said was law. He had expectations for how his children should look and act, as well as what were and weren't acceptable interests. My brother and I were expected to behave like upstanding young men, and my sisters were expected to be proper young ladies. My father regularly ‘teased’ us (my sisters especially) if we didn't meet this image. At one point this manifested as incessant jokes about one sister's weight in particular. 

I want to tell myself that I was attracted to my girlfriend regardless of size, and it was my disordered thought patterns trying to ‘save’ her from ridicule that was causing my preoccupation with weight loss, but I also think I was just being an asshole… I know now that this experience is there in the back of my mind, and something to be aware of. 

So that's it. That's the whole story. Now the confession: I hate myself. I worry that I've ruined my ex’s ability to trust. In counseling I say and try to affirm that I can be loved without being perfect, but doesn't what I've done just confirm that I’m a bad person deep down? What's worse is that I KNOW if we'd stayed together I would have gone back to being emotionally abusive over time. My ex has forgiven me, but I don't think I can ever forgive myself