God does not change based on your circumstances.
If the Bible is true, then God does not change: he is the same yesterday, today, and forever. Hebrews 13:8, Malachi 3:6
So, if the Bible says that God is good (Psalm 100:5, 136:1), why do bad things happen?
I had a lot of self-image issues. I, like many 13 year old girls, thought I was unattractive and worthless. What did I have to offer anyone? Nothing, and I was nothing, no one would miss me if I feel off the face of the earth (not to mention suicidal thoughts).