Should I ask to kiss her or just do it?

If you're absolutely sure the other person wants to kiss you and you’re confident enough to lean in and kiss them, they may see you as a confident person who doesn't mind taking the lead. Those early encounters are about the newness, and when someone is assertive, it can be exciting, as long as it feels good for both people.

It’s a good idea to ask before going in for a kiss. There are some non-verbal signs you can look out for to determine whether someone's into you (prolonged eye contact, leaning in closer to you, or breaking the touch barrier), but at the end of the day, asking is the only way to know for sure that they want you to kiss them. Consent is essential when you want to be physically intimate with someone in any way, including kissing, so asking is always the best option.