If you're not dating anybody else and there's noone else around you who you find interesting, then you haven't really got much to lose.
The chances of things working out long-term aren't very high. Even if a long distance relationship starts out in the same way as a normal close relationship, peoples lives tend to diverge from each other after a while. When there's a huge distance involved and you never see each other in the physical world, then the relationship starts to drift away from reality and ends up turning into a kind of idealised fantasy.
Most relationships (whether they start out in-person, or online) are sparked by some initial chemistry, lust and attraction; the problem with distance is that it quickly leads to chronic tension and frustrationl. The tension can often lead to showing each other a lot more attention than you might do otherwise, which in-turn can end up with a lot of intense emotions which might never actually last when you're eventually together.
IMO, there are usually two likely outcomes where it won't work. The first is where one or both of your lives diverge so much that one or both of you end up meeting somebody else, a new group of friends, finding a new hobby, starting a new course, etc. When one person diverts their attention elsewhere, that really sucks for the other person who probably made all the effort but actually never had a chance at making it work..
The other outcome is that you might survive the distance, but reality ends up in disappointment - you thought you knew everything about each other, but then you start to learn about their annoying habits and quirks, or the "bubble" which you'd been living in just bursts and you realise that you'd assumed an emotional connection which never really existed, or being apart from them for so long means that they aren't the way you remember them..
I'm not saying that it can't work, but there's a very, very high probability that it won't work. Particularly at 16 when your life is already likely to change quite a lot over the next few years.