>>26896 (OP)Take this advice from somebody whose been down this road: you're attracted to what you're attracted to. No amount of conversion therapy or convincing yourself otherwise is going to change that. Going down the suppression path just leads to anger and mental illness.
You're attracted to fat chicks. It's not that big of a deal at the end of the day, and life is way too short to get hung up on it.
Your options are essentially to date people you're not physically attracted to (or not date at all) which will only work out well in a narrow set of circumstances, like if your partner is asexual and you're okay with using porn to get off. On the other end, you can date the immobile you are attracted to, which in your case is probably impractical given how extreme that is. Most practically, you can find a compromise somewhere in the middle, where you date somebody whose still quite big and that you find attractive but in a more manageable weight range.
None of these options are going to change your sexual attractions, they're more management techniques. Some are more manageable than others. All rely on you accepting that you get off to fat women.