Mentally I'm already exhausted

I'm a grown man, and I hate to be here knowing I believe I'm powerless against my addictions. I've isolated myself, I'm a hermit punishing myself for nothing. I've pledged and repented for what I have done to myself. Our time is precious, I'm sorry to have thrown away so much of it, I do not want to waste my youth on feeling sorry for myself. If anyone has any tips for building self control, I would love to hear them.