Re: when is a good to time to ask (sex)
I'd like to expand on what Tmal is saying by putting your personality out there with clear intentions of just being fun. The more fun you are to be around the less likely they will be guarded about being around you. Let your personality do the work. Take your ttime in learning how and when to respond to things because you want to move things forward. Don't make your goal all based on one moment and one girl. Only doing so will close more doors with a girl and more chances to fail without getting better because you aren't working on focusing on your social skills in general. I believe most guys tend to build too much anticipation for one girl and tend to become too invested in that one moment.
Learn to relax and be yourself. Be creative with your responses so she knows what she's likely to get during and.after any close or any plateaus you both meet. The more you see problems and .ca maneuver around and the frustration starts to show the more they can smell the unattractiveness of social comfortablity in these situations. Be yourself in every situation. Know what you want and decide what you're willing to do to get it. If it doesn't look promissing then don't invest so much. I'd still suggest to invest but know that its not your lost all the time. Be firm in your framing with intentions and be yourself in every encounter.
Every moment counts, get out of your head and enjoy it.