If you are still using alcohol to self medicate and avoid, then it will add to your depression and inhibit emotional maturity. Using alcohol NEVER solves problems and always adds to creating more problems. Yes, the brain forms an addiction to alcohol and it's very hard to stop and often people first have to detox and then they have to learn how to live one day at a time with support and therapy until they develop healthier coping mechanisms that help them begin not only healing but maturing.

I am sorry that your mother lacks the education to better understand this challenge. You are better off doing what I suggested above and becoming part of a group that does understand and can offer the support you need. No one sets out to be an alcoholic, instead they often drink to relax and escape. Some use it to escape the symptoms of ptsd brought on by trauma. Some just start for social comfort and develop a problem.

That being said, when someone does develop an addiction to alcohol, their life revolves around this addiction and they end up facing more problems due to how the alcohol never solves anything, can actually damage that problem solving area and can cause the addict to self sabatoge creating even more problems. Also, people with this kind of addiction can have narcissistic behaviors due to living their life around using and being in denial and having mood swings like a doctor jeckle and mr. hyde.

It's possible you developed ptsd from the rape and began using alcohol to escape from how it affected you. Please know that the alcohol doesn't help you heal. Actually it can make you more prone to experiencing other abuses.
The only way you can heal from the rape is to seek therapy and learn how to process it and move forward despite being raped.

I am very sorry you have been a victim of rape. I know that it's not easy as I myself was drugged and date raped and attacked by an agent (I was a lead singer in a band performer) and trapped by a dentist in his office where he tried to molest me. I was YOUNG and very niave and too trusting and that's exactly what these type of predators look for. This is why I gave up singing and performing, I just felt it made me too much of a target. I was even attacked by a drunk on stage where the band had to pull him off of me and I was chased in parking lots and it got so I could not walk out to my car alone.

However, I did not use alcohol to escape, I made different decisions where I was not so vulnerable. Alcohol use just made me feel more vulnerable and so I did not seek to get drunk or total numbing.