Sorry to hear that. Try a honey jar, take some herbs or crystals that work with attracting friends. On a piece of paper, make a list of qualities you want in a friend. Place all the items in the jar and fill it with honey and light a yellow candle. Charge the jar while visualizing your desired outcome. You could also just light a yellow candle and visualize yourself with friends. Think about all the good that will come with friends.
Either method you use be sure to charge the items with energy, focus, visualize, and work to achieve your goal. It might be scary, but talk to people, volunteer, or go to different social events where you can meet these new friends.