Good luck, OP. Having cold approached nearly 200 girls myself, I can give you some pointers:
- Approaching in malls is good, but switch up your approach venues. I've had run ins with security who recognized me because I kept approaching in the same place. Just find a few different malls to target and try to stay discrete.
- Don't burn yourself out. Spread out your approaches over a period of time. Too much rejection in a short space of time will get you down.
- Find other reasons to go out and do your approaches while out. Last year I would go into the city specifically to do approaches - I wasn't there for any other purpose - and it became a chore and started wearing me down. Now I just approach when I'm in the city for another purpose and wouldn't be doing anything anyway, and the rejections don't affect me as much.