Upset and depressed. No one needs me.

Hello Vishakha. I can understand that a lot is going on.  A fearful past that is not dealt with can  cause a fearful future. But we can always take up charge of self, release the ghost of past, build stronger self esteem and resilience to build a happy present and happy future. Mindfulness based practices, working on to build healthy thoughts, emotions and also working on having meaningful relationships can be done.

you can consider connecting to mental health professional and understand how you can come over the problems.

some quick things you can do: Talk to one person about your feelings. Help someone else by volunteering. Have lunch or coffee with a friend. Ask a loved one to check in with you regularly. Call or email an old friend. Go for some exercise/walk, movement enhances happiness hormones Schedule a 'me time'. You must take that out so that you do something you want to or you like to make you feel good. remember you Matter. challenge negative thinking. When you really examine negative thoughts  they don’t hold up. Trick is to identify the type of negative thoughts that are fueling your depression, and replace them with a more balanced way of thinking. Do not let self doubt creep in based on opinions of people. Everyone is mix of strengths and weaknesses. So there are always going to be strengths of yours all you need to identify, believe  on them.