Have you had your testosterone levels checked? I was 32, your age, when I decided to have mine checked as I was noticing more body aches, less results in the gym, depression, etc. I found out my total testosterone was 470 (normal is 250 - 950). My free testosterone, which is the bioavailable testosterone and what actually counts was 11 (8-25). So I had very low bioavailable testosterone. It could have been due to the depression or it could have been causing the depression. There were probably other factors at play. Doctors wouldn't treat me since I was technically not low enough to be labelled as having "low-t," but with a Free T of 11, I decided to take things into my own hands. I did not want to have the testosterone level of someone in their 60s. I got on TRT and I immediately felt a lot better... my body started changing over the next couple of years. It caused some major improvements in my life, but of course, there were still ups and downs and I was still using weed to self medicate. I normally wouldn't recommend this to the average joe who isn't into fitness, but since you said you were (and how we look plays a big part in how we feel as well), I thought I'd mention this to you. It may not be an issue for you, but it's something to consider looking into. I'm not sure where you are, but here in the US, there are website where you can get an order for blood work for relatively cheap and take it to a clinic that takes some blood out, and you have your results in a few days by email. That's what I did.
Anyway, for me, the biggest motivator for quitting was that I wanted to see what I could do living my best life weed-less. I wanted to get a baseline on who I am without this drug. I don't think 6 months is enough time to get that picture after consuming for 15 years (or 20 years as was my case). I am at 6 months, but I plan to go without it for the rest of the year to see where it takes me. It can either stay the same or get better. I can live with that. If all else fails, there will always be weed, but I'll never get back the years I wasted getting high and avoiding things in my life because I was too stoned and paranoid. If, at the end of the year, I don't find I benefited much - then I will reconsider. I'm going to try not to assume that the past 6 months are indicative of what the next 10 years will be without weed. I have to have an open mind and try to rebalance my dopaminergic signaling. There are a lot of factors at play in how we live life today vs before we had smart phones, social media, internet, porn, etc. Anything that gives us easy dopamine, such as weed and porn, a bright shiny YouTube screen, etc., acts in very much the same way on our brains. It's cheap pleasure, and that's why it's so addictive.
This is from Wikipedia: "Studies of motivation suggest that laziness may be caused by a decreased level of motivation, which in turn can be caused by over-stimulation or excessive impulses or distractions. These increase the release of dopamine, a neurotransmitter responsible for reward and pleasure. The more dopamine that is released, the greater intolerance one has for valuing and accepting productive and rewarding action.[6] This desensitization leads to dulling of the neural patterns and affects negatively the anterior insula of the brain responsible for risk perception.[7]
ADHD specialists say engaging in multiple activities can cause behavioral problems such as attention/focus failure or perfectionism and subsequently pessimism"
I don't know about you, but this rings true for me. I'm notorious for putting things off and getting distracted by everything except what I should be doing. I hoped that quitting weed would help, but it actually hasn't - yet. I now removed the drug that was blurring the lines and can now focus on the real issues at hand - my consumption of media, how I interact with the world, etc. The drug is just a blanket, it's what we do without that veil that will determine our fate.