You shouldn't have to give up friends because you tried weed. Hell a lot of people have tried it just for the sake of curiosity. I've done it myself for nearly 2 years among other things. You shouldn't have been punished that bad. As for your gf and her mom. Just try to keep your distance from her mom if you can. She just sounds like trouble. Just keep doing what ya been doing with your gf and be happy with her. Don't worry about the mom. A lot of moms don't like their daughters bf or sons gf. It's not uncommon. You are still worth something. Trying out drugs don't make you a bad person. Just would be better that you not continue with it. Imo the more stuff I've done and been through gives me wisdom to help others and I use my troubled past to help as well. You gotta try seeing the light in the darkness. Try getting some friends to hang out with and you might be happier.