You are not a loser. Not at all.
I see you putting up roadblocks to positive change though.
"I can't afford help" Check out what free help is available to you in the area
"I'm shy" You don't have to talk in AA, you can go and listen at first. Maybe talk privately with someone you feel you might connect with.
"I can't afford a treadmill" Go for a walk outside, it's free.
For cravings have you considered some of the medications that are available? I was on Campral for a while and found it to be very helpful in reducing the frequency and intensity of my cravings. They still came, sometimes, but were much more easy to manage. If paying for a doctor's appointment or the medication is an issue do some research and find out if there are any free or reduced cost addiction centres near you that can offer an appointment with a doctor and the medication at a price you can afford.
Oh and stay close to SR, we are here for you.