Used to be very serious about this, now i take it for granted

First let me say congratulations on all your success over the last 4 years. None of that is easy so it shows you have the discipline to accomplish goals when you set them. And just like many of us here, porn has crept in and ruined part of your life. As i read your post I have a couple of thoughts for you (these are things that worked for me so maybe they can create some new ideas for you):

1. When you set a goal it's something that you clearly work for and can accomplish. Instead of setting some grand goal for quitting porn, like I am going 90 days without porn, set smaller more obtainable goals. Set a goal for 3 days. When you accomplish 3 days, set another goal for 3 days. Eventually increase it to 4 days. I think as a smaller goal it seems a lot more obtainable and will help keep you focused and eventually lead to a long streak. Think of it as similar to getting those degrees. By passing each class you obtained the small goal which led to the big goal, the degree.
2. One thing that has helped me decrease my porn usage (I'm far from perfect but a lot better then i used to be) is keeping a journal of how i felt before and after watching porn. This helped me really identify my root causes and come up with a plan to know when the urge is coming and how to deal with it.
3. This one when I have shared it in posts has had some criticism, but it works for me. I've developed a penalty system for when I relapse. Over the years it has been modified and I have to be strict with enforcing it on myself. I make the penalty be some of the worst things I can think of. For example I am into health and fitness, so if I relapse, I do not allow myself to workout for that day and the next. In fact I say no activity at all, not even going for a walk. When I look at my schedule and see something like my bowling league on Tuesday night i know i can't relapse on Sunday, Monday or Tuesday because then I have to skip bowling which I enjoy.
4. Being in a relationship is clearly something important to you. What are you doing to find this girl? Are you sitting at home waiting for her to come knocking on your door? Are you taking any actions to find a girlfriend? If not, set that as a goal to do one thing a day to interact with a woman. It can be as simple as saying hello as you pass on the street. Or maybe asking someone for a suggestion at a restaurant.

 

"Running out of time" at 23 years doesn't make any sense. You have almost an entire life at your disposal. Think about older men (like me) who *started* this path in their 40s. The most important part is to realize that there's the problem, which is already your case. Then you can start working on it. At your age, you haven't done any damage to your brain and you can heal it very quickly. You "just" need (not easy, I know) to be disciplined.

 

I think you're overthinking in the bad way. The more you try to force to find a girl at all cost, and the less the chance to really find a girl. Most of the times it happens in a "natural way". Just stay active into society, go out with friends (both male and female), to some (healthy) party. Maybe try to learn to dance and go to dance clubs (dance always helps to create affinity and intimacy). You're young and without health issues, which both are a big plus. To overcome your addiction try to do something that doesn't let your head think on porn and masturbation. You need to replace one thing (porn) into another (healthy jobs). If you "need" to relapse sometimes, do that without porn. Maybe it's not "politically correct" and good to write this, but you can always go to paid... not an "elegant" solution, but it's always better a real sex than masturbating on pixel photos.