I think I’m going to make a friend

Im 25 and recently got another job and there this guy who’s my age I talk to him and just ask how’s your weekend and that small talk and he sometimes approaches me and says hi which I never had but when I’m talking to him I’m so paranoid that I’m going to ruin my change of having a friend. Afterward I critique everything I said. I’m so scared they are going to realize I’m a loser and leave me.