I'm getting a bit bored of a sport?

Mix it up a bit. Play other sports alongside your rollerblading just to keep things interesting. Or you can stop rollerblading altogether, play other sports and then get back into rollerblading again later on. If you find that it's a struggle to get yourself rollerblading again, then you are definitely bored of it. Otherwise, you may find that you need a break from it. After all, if you are doing just about anything everyday, it will eventually get boring no matter what you're doing.