It's truly a different cognitive experience when you are under the influence of weed. For me I would use it in way of antidepressants and I would abuse this benefit of smoking weed. Often when at work, in college lectures or working on creative projects. 

So when I'm not smoking, I feel a sense of disassociation with activities that I would do while high. Suddenly life comes flying back at me, I actually feel as if I cannot remember how it was before I smoked. Feels like people treat me differently, but again it's very hard to distinguish as I have become quite antisocial too.

I probably do need therapy. It's not affordable for me at the moment unfortunately. Will probably be the first thing I look into once I finish university however.