You're 17. That's the best time to fuck around with as many people you want (or don't want), find out what you're actually into and what you want in life and everyone who shames anyone for it should be ashamed of themselves. You have at least another 13 years before you need to start looking for a serious long term relationship, you probably aren't even out of high school yet. Enjoy it while you can and don't let anyone put you down.