Break up

How do you cope with a break up ???? I litterly don't want to do anything and seeing him talking to someone else hurts so bad. I hang with friends and feel better for a little while then I'm back to where I starred. It's been almost 2 months since the breakup. I feel that I should start talking to someone else but I can't my mind is always on him and me being with someone else makes me feel like I'm just using them to feel the love. I'm not the type of person to just use someone to feel things. I want to be with someone who loves me and I love them back. I have always being the 3rd wheel to everything, I have been my whole life. It makes me feel like I'm not good enough or pretty enough, or there is something wrong with me. I just feel like crying all the time. I just wanna give up. idk what to do.