If I don't change, my history will repeat itself forever

Hi, my name is Alex. By day I'm a web developer, by night I'm a Powerlifter. I would like to share why I'm on NoFap. I'm also writing this for myself, for when I need motivation to stay away from porn.

My addiction to porn started 8 years ago, and I haven't been 2 weeks without PMO since then. I've been angry with my addiction before, and I've just accepted it as a part of my life. It's a cycle of guilt and tolerance.
I've noticed some things about myself in the past few months which scare me, and have motivated me to change. I'm no longer angry with myself, I'm not angry with porn. I simply can't continue to PMO. This is why I'm going to stop:
- It's affecting my motivation to do things I enjoy. I can't count the hours I wasted. The time and energy I could have spent doing more productive and fun activities.
- It's causing damage to my body. I started Powerlifting 1.5 years ago. I love the sport, and I'm motivated to be a world class athlete someday. A top athlete in the sport has told me my potential, and I want to get there. 2 years after my addiction to porn started, I noticed that my shoulder started to hurt. 6 years later, I realized that the pain is from repetitive stress from excessive masterbation. The pain is causing an imbalance in my body which is effecting my ability to train and push myself.
- I will not accomplish my goals while using porn. My boss at work is coaching me for a promotion. I know I have the skills required, but my social anxiety could really hurt my performance in the new position. I will never be a great athlete while I'm addicted. The time I've spent training and eating, the sacrifices I've made to be great would be for nothing.
- It's causing me to be anxious and antisocial. I have a hard time being professional with women in my workplace. Not that I'm rude or inappropriate, but my communication skills seem to leave me when I have to talk with a female co-worker. I won't be taken seriously if I'm just the awkward shy guy.
- I fear I may become desensitized to "harmless" porn. I never want to be a part of or support abuse.
- I have a hard time relating to people's feelings. My wife get upset with me sometimes. I struggle with sharing emotions, and appropriately responding to how she is feeling. I want to quit porn so I can be better for her. She is my biggest supporter and my biggest inspiration. We're a team, and we're working on our flaws together.

My first goal is hard mode for 2 weeks. This is something I have never been able to do. If I'm successful I'll do normal mode for 90 days. I hope to be active on this forum and do what I can to help people sharing my struggles.