When to kiss and when not to kiss, that is the question. Well the rule number one here is to go with your intuition, your gut feel but not with your desires. If you go with your desires you are going with what you want, whereas you need to think of what your partner wants.
However, you can check out these benchmarks -- to make sure your girl is as ready as you are.
Verbal - Listen for your cues...
Listen to her words, is she flirting with you or trying to put you off by making excuses about going somewhere else.
Is the conversation quick and exciting.
Are you two getting along like a house on fire or are they periods of time when you can't think of what to say.
If you think you are getting along well and you can feel a connection with her, chances are you are doing well.
Facial - Watch for the signs...
Is she making eye contact.
Watching your lips as you speak or your hands.
Licking her lips, or sucking them, or pouting or putting on lipstick.
Playing with her hair or tossing it over her shoulder.
Are her eyes wide and fixed on you.
Is her face flushed with excitement.
Her lips smiling.
Physical - Notice her body language...
Is she leaning towards you.
Is her body angled towards yours, or has she crossed her legs away from you.
Is she holding your hands or touching you often.
Mirroring your movements.
Playing with the glass, an object, anything at all.
Has her legs crossed towards you.
Psychological - Sense the connection...
Can you feel a connection with her mind.
Do you feel you get along with her.
Feel you know her in a short time.
Even if you feel she will be receptive to a kiss today, hold off a little and kiss her later. A little anticipation is the spice of life and will send excitement streaking through your veins when you actually kiss her.
In short, if you are aware of her and conscious of every move she makes and your eyes lock all the time, and you somehow end up focussing on her lips and her eyes are on yours too, well that's it ... go for it.
Just lean over and plant a sweet lip to lip kiss ... easy and gentle does it. After that you can continue to communicate, if not through words than through lips...