Help!?how do i kiss her?

My girlfriend of three months is going away for a four day weekend and I want to kiss her before she leaves. We havnt kissed yet but we both have talked about it and want to but we're both kinda anxious about it. We are eachothers first bf/gf and therefore each of ours first kiss. Tomorrow we have a half day at school so she is coming over for lunch and then we are just going to chill out until her field hockey practice. When she has to go, I will walk her down to her house like I always do when she leaves(she lives right down the street from me). And this is the part im not sure about:Before we say godbye to each other, we alwaysgve eachother a really big hug and its at this point i really want to kiss her. How do I do it? Like I said, ive never had a real kiss before so im not sure what to do at this point, I think thats why im so nervous. Like, after the hug, do I hold her hands? keep my arms around her? Hold her in some other way? And then how do I go for the kiss? What do I do to show her i want to kiss her? And then how do I kiss her? do I keep my moth closed? Partly open? Do i put suction on her lip? I really have no idea. I never even wanted a girlfriend before i met her and now I never want to leave her. Love has never been an emotion ive had to use before so its al new to me. Any advice that you can give would be greatly appreciated, Thank you!