I have a mare that her mane is a normal length, but i'm starting to show English.I know pretty much everbody pulls or thins, but if I can I like to keep it long .Is there any braid or style or something that you can do for show without pulling?
What discipline are you? In lower level eventing you can have the mane however you want; however, most people pull it to keep it short and thin and out of the way. Hunter jumper is different though. I don't know a whole lot about their world but I do know that they are pretty picky about looks so you would probably have to braid it (and that usually means pulling it, as it is really hard to make a long, thick mane look good in hunter braids). Do you know how to pull a mane?
Depending on what "normal length" is, you have several braiding options. If it is long enough, you can do a running braid. If it is sorter, but not short enough to do the hunter braids that you do with the little pull and thread, you may be able to do buttons.
I managed to groom a mane of a cob enough to get some decent braids in... Sometines just brushing and combing alone can get the mane thin/tidy enough to easily(ish) braid it up. Running plaits also look good (a personal fav. Of mine hehe) but for the show ring you probably want braids so I'd try that too