Welcome to SR alda.
Meth was my drug of choice when I was very young. Needles and the whole bit.
I quit it 25 years ago and from what I ewmwmbwe it was very hard to give up and easy to go back to.
After I reached about 60 days though I remember not wanting to do it again and I haven't.
I quit when the going up was no longer worth the coming down. If you are at that point if you stick to your guns you will be able to beat it.
Good luck.