How can I try and turn my life around?

2B brave act brave. Nobody is going to reach out to you to make your life better. Nobody owes you happiness or fulfillment. You must take appropriate initiative. If you're old enough to be writing, you can walk away from a difficult past. Stop doing the things that waste your time, join an activity where you are likely to meet someone, learn a new marketable skill, be a diplomat & learn to enjoy your own company.