How can you come up with the best things to say to a girl? This question has a relatively simple answer: you pay close attention to her. The cutest, funniest, and most romantic things to say to girls all come from this.
Paying attention to a woman and remembering as much as you can about her – what she tells you, what she likes, what she is like, etc – will allow you to make anything you say to her detailed and specific, and will thus make her feel loved, appreciated, and special.
Anytime she feels this way based on what you say, of course, you have done a great job with your words.
In order to come up with the cutest things to say to a girl, therefore, you cannot be lazy around her. You should be listening to her when she talks to you, and remembering what she says. You should be paying attention to things she does and things she owns to get a sense for what she likes and dislikes. And finally, you should be noticing as many specific details as you can about her.
Notice the way she dresses, the way she walks, the way she talks and laughs, and even the way she sneezes or hiccups, and notice everything you can about her physical appearance. This can be a difficult thing to do, but over time, if you practice long enough with a girl or practice on enough girls (or both), you can become so adept at it that it becomes natural to you. Either way, it will certainly prove to be worth it in the long run and will set you apart from other guys that might also be after her.
If you have been doing this well, and for a long enough time, then you will never run out of wonderful things to say to a girl.
If she has any quirks or slightly embarrassing things she likes, don’t be afraid to playfully tease her about them. This will certainly make her smile and make you, in turn, seem charming – both always good things – and will also show her that you know her very well. If she mentions something she likes or loves and something in your surroundings reminds you of it, bring it up to her (“Hey, look, that woman’s got your favorite _____,” etc.) If you remember places she said she likes, take her there one night (“I remember you said you loved to go to _____.”)
In all cases try and take advantage of what you know about her to make her feel special.
Finally, you should use all the details you know about her to come up with very personal and specific compliments. Don’t simply tell her she is beautiful, tell her what, specifically, about her is beautiful. Don’t simply tell her you love her – though, you should do this as well, of course – also tell her what you love about her. It is these types of things that can form the cutest, most romantic, and all around greatest things to say to a girl. It might not be easy to find such things, but it will be worth it.