Girls

Don't listen anyone who says that you've got nothing to lose. By entering a relationship you're potentially surrendering your mental well being and any stability that you have in your life right now. It's very easy for a girl to cheat on you with another guy which would leave you an emotional wreck: you're clearly losing something if you develop depression and self-harm due to a girl cheating on you after ending a long relationship. You must also think about why you want a relationship and whether it is worth risking your current state in life to have a girlfriend?

who invited this loser

Don't you mean "ugh this person is saying that relationships can cause severe harm and that it's a bad idea to date someone because you can. I don't like it so you must be a loser"