Hi @Daisygh, I’m so sorry to hear that your mum passed away when you are so young, and that she struggled with addiction and had difficult events in her life. It is very common for the time just after the funeral to be particularly hard, as there is less to get on with and, as you say, other people may be starting to go back to ‘normal’, leaving you feeling isolated.
I’m glad you’ve found this community, and I hope that it helps even a tiny bit to be able to share things here. All our users have lost loved ones and will understand some of what you are going through.
We have a user posting regularly called @Fg15, who has recently lost their partner through alcohol. You can see one of their posts here: Recently bereaved through alcohol
There is also this post from @jonlight1357 who is 24 and lost their mum who suffered from alcohol-related problems: Feeling alone - that post is a few months old, but you might still find it worth a read.
And here is a recent post from @Rabbit17, who has lost her dad through a different cause, but is close to your age at only 18: Losing my Dad in lockdown
The Bereaved Through Alcohol and Drugs website also has information and support which you might find useful: https://www.beadproject.org.uk/