Depression can be used to excuse for our behaviour but I know, from personal experience, that depression has caused me to behave in a way that I wouldn't be like normally. I have suffered with depression since I was 12 or 13 which became severe when I was 19 ~ won't bore you with all the details
- and it did affect me and my behaviour. Due to stuff that happened when I was 19 I lost my trust in my family so couldn't trust anybody. If I couldn't trust my family how could I trust anybody?
I was shy anyway but became more introverted, kept everybody at arm's distance and put on a happy front. It took me many years to admit to myself that I was suffering with severe depression which was worse at certain times of the year. When I did I was able to be honest with myself I was able to come to terms with behaving badly at my worst. I'm not excusing it I am simply saying I needed to come to terms with it. Since then I have learned ways to deal with my low moods ~ constantly severely depressed now ~ which includes doing voluntary work, writing, trying to get fitter and so on.
Of course what works for one person doesn't for another. Understanding and accepting you suffer with depression is half the problem.