Using vape(nicotine) for a month now and it has helped me

I used to be that person who used to usually only smoke with friends at a party or after basketball but this past month I have been using a vape and the effects of nicotine have all over made a change in my thought and pessimism.

Benefit:
1. Not overly egoistic
2. No arrogance
3. Not to pessimistic
4. More active (WFHCel)

I would leave this habit after the vape expires and hope I wouldn't revert back to my previous state of mind, is this a placebo or does nicotine actually have benefits?