You are not the problem.
You've went through a lot, and it's time to forget and not dwell on past experiences. It's better for you to just relax, and be yourself. Don't ever think about what you lack. Rather, concentrate on your advantages and strengths, and continue to learn new things. Your weaknesses are just things you're yet to learn on, and improve on. Heck, I'm pretty sure that you're close to being perfect already. I'm glad that your parents now want the best for you, and really don't want to put you through the things they did anymore. This means that all you need to do now is get out there, change yourself for the better .. slowly but surely. By that I mean doing things that will slowly improve your self confidence. I think that quitting drugs, smoking and magic shrooms and stuffs and replacing them with positive habits will help. Most of all, no matter what you do, have a sense of self-pride. You're better than you think you are, and it's better to never hesitate when it comes to what you can do. Strong, determined and so you- that's how you should be, and you can learn to be that way.
I think that for you and Angel, it's better if you can go back to being relaxed around each other, and get into moods where you get to enjoy each other's company. You might be thinking too much- every girl has periods of time with her boyfriend/partner/fiance where they just want to fulfill their wants and needs. It's better for you to let her satisfy herself by satisfying you. I'm sure that's what she wants, and if it makes the both of you happy, I'd say go for it.
I'm glad that Angel is literally an angel, and she wants you to be happy and wants to support you. I'd say that the best thing to do now is to let her support you, and share your feelings with her. It'll make her very happy to know that you want to express yourself more, and that you want to be even closer to her emotionally than ever before.
You've got a sweet girlfriend, and your parents have repented.
Now, all you have to do is not dwell on the past, forget your insecurities because we all have them (but we are all our own unique beings with our own unique strengths... you are special ) and move onward. The future is already bright - now make it even brighter!