I started getting really reclusive, paranoid and depressed. I'd wake up every morning and feel like total rubbish and couldn't figure out why (I should have realised it was the weed earlier I know). My mates would ring me up at the weekend and ask me to come out for a pint but I would rather stay in and get stoned.
It got to a point where the negatives were far outweighing the positives, in fact there were no positives, I wasn't even feeling stoned anymore when I smoked, it just made me seem to feel "normal". I started to look at the people around me who smoked too and realised they were all going nowhere fast so I decided I didn't want to live my life like that anymore and make a conscious effort to stop buying it.
Don't get me wrong, it was one of the hardest things to shake for the first 3 or 4 weeks, and then it got gradually easier and easier and I started to enjoy life hugely just for the simple things.
I had a couple of slip ups where I had the occasional toke at the pub if someone had it but it gave me instant paranoia and made me realise why I stopped in the first place.
I didn't consciously separate from my friends that were still doing it, but after I stopped I realised I didn't have much in common with them anymore. I still see them and hang around with them from time to time but now have a different circle of friends that doesnt revolve around playing xbox and getting stoned everyday.
Giving it up was the best decision I ever made and I feel like I got my life and my personality back. I'm much sharper, much more sociable and enjoy the small things in life. Overall I'm a different and better person