How do I control my nervous on a date? it's my first date ever and i'm in my 20s. How do I know when to kiss?

Never ume when a girl will loose interest or do what you you think they will unless you heard it from them; then only believe it half the time. Be confident. most women don't want a guy when he doesn't know what he wants. Be honest with her. Tell her that you haven't been on a date for a very long time or ever. Then if the date is going well, (she is laughing, and you are both having fun and enjoying each other), look her in the eye and tell her the truth. Tell her you want to kiss her. Then keep looking. If she doesn't pull away...then do it--if she doesn't kiss you first that is. Good luck man.