A rejoining from the past...

Just contact her, see what happens and don't be too disappointed if things work out poorly. On the other hand, do be happy when things work out well.

You've got the idea in your head, it looks like you don't have a lot to lose. Best to get it over with so you get a simple yes/no answer instead of a frustrating "maybe".

Just say "hey whats up" and everything will take care of itself. Don't over think it. keep your mind clear and just talk to that person. Over all it shouldn't even be such a big deal to you,

The cemetary is full of "should have, could have, would have"
Just do it for eternal peace of mind

Maybe you could ask her if it's okay to speak with her after all this time. You would still be talking with her, but it won't seem as much like a completely out-of-nowhere conversation.

Five years is already a long time, especially going from kids to teenagers. Just say hi and try to befriend her again and see if the her today is still someone you would like enough to date. :)

Edit: I just saw that you just wanted to befriend her again. I think it's okay to contact her and see if she'd like to try being good friends again.

You are thinking of her after that much time has passed, which means the is sort of important to you. Definitely go for it, throw her a message, nothing wrong about that, at any case. No early or late moment for it, just do it. Also the fact that you haven't been talking for quite some time doesn't mean that there wouldn't ever be potential to do so again. So, good luck buddy!

Let's start by the base. You have nothing with her. If she rejects you, you'll lose nothing. If she 'accepts' you, then it's good.
It's always better to leave no stone unturned. You'll be wondering in 10-20 years from now, what could happened if you speaked to her.
Do the most to have no regrets, you have only one life and could end in any moment.
..........
Oh, it was to be friends. Yes, the same applies.

So do I infer correctly, that you are 15 years old?

if you don't talk at all anyway then it can't get any worse, right?
however, chances are high you're just gonna look like a creep showing up after all this time.

And ahead and talk to her, I stopped contact will plenty of people in my life, and I don't hesitate to contact them again. Sometimes they have mostly forgotten, other times people are glad I'm talking again.

Also, there's nothing wrong with being freind-zoned, I still don't get why people expect to become a pair with a friend just because you talked a lot :P

Don't live in the past. Usually people we used to like aren't as cool as they used to be. They've changed, we've changed. We might even don't like each other now. I've had some nice friends too I'm not talking to anymore - it's how it goes, nothing wrong about it. Just find new friends. There is nothing wrong about talking to her though - just don't expect too much (actually I really wonder what do you expect from this chat with her).

Just say hello and see what happens... :)

i contacted a few girls i had no contact for years with (yes a few times with hidden agenda :P) and sometimes it wents good , sometimes not... but for my mind it's better than thinking the whole time "should i or not?"

Ehi Leaf. Penso che dovresti provare a mettere a posto le cose tra di voi, ma questo non significa necessariamente scriverle... Non saprei, le donne son strane, ma di sicuro tornare a scriverle facendo la figura di chi magari "torna implorando" non ti renderebbe molto più "papabile" ai suoi occhi, e contando che quella volta ti scaricò l'obiettivo è aumentare la potenziale attrazione che potrebbe provare nei tuoi confronti. Quindi secondo me ti conviene rientrare in contatto con lei ma indirettamente, che so, magari "frequentando" online i suoi stessi ambienti e vedere se magari si accorge della presenza di una vecchia conoscenza (che lei penserà essere lì per caso). In ogni caso io sono un inguaribile romantico, quindi per me la risposta è "SÌ CAZZO VAI E CONQUISTA!" ma non sono sicuro se il mezzo migliore per farlo sia riscriverle :s
Sorry if I speak spaghetti but the subject is thorny and using OP's native language (that is, by chance, also my native language) allows me to answer more straightforwardly

Chris McLean :D
I say do talk to her, but don't embarrass anyone

My advice is to talk to her, but only if you have friendly intentions. If you are just thinking of talking to her so you could get her in a relationship with you, then you have the wrong motives. Befriend her again and don't take "friendzone" as an insult if you value her as a person. Good luck! :)

You met her online?

Your timing is wrong cause you're overthinking it.

Just talk to her, enjoy the required cold shower like all of us had at least once in our lifetime (she probably already got or has a boyfriend and she will mention that before you manage to say anything vaguely romantic), and move on.

Boy you're 15, time flies by.. i'm nearly triple your age. :p