I'm sorry you're distressed. Are you okay with being by yourself? Maybe you could have a good lady friend or do you have a sister or aunt who could keep you company. You said you don't feel needed - this is common when children are grown and leave the house. Women become accustomed to always taking care of others and now you have all this time/desire to fill needs. How about you make an appointment to pamper yourself if you can afford it.

You can also start volunteering - this is very good for the soul. You need to switch from filling others needs to filling your own. Be selfish a little and think "I need me and I deserve to feel content". DePressMe is right, suicide is never an option. Find new outlets for your desire to feel needed and remember to love yourself.