Welcome to SR. You know you should quit, and you probably know most of the "logical" reasons to quit, unfortunately though, drug addiction pretty much defys any logic, and if you like the high, your not likely to stop, until it becomes such pain that you feel you can't bear it anymore.
And you will reach a time where you don't love it anymore. I did. Others have.
Anyway, I'm sure somebody will stop by and list all the reasons, so stick around.
Once again, welcome.