“I’m dating somebody but I have a super huge crush on someone else. What do I do?”
This is definitely a tough situation to be in, but it’s okay! There are ways to go about this without hurting either of the people you’re involved with. The first, most important thing to remember is honesty. Be upfront with your current partner. No matter what, do NOT cheat on them, and do not mislead your crush into thinking you’re single. What I would do is take some time to myself to evaluate before taking any action. If you think your crush is the person you want to be with, you should tell your partner that you think you would be better as friends or apart, or that you want to take a break. Tell them that they didn’t do anything wrong, but you’ve been questioning your own happiness and you don’t think it is with them. It’s not because they’re a bad person or they’re unworthy, you just might have feelings for someone else. You could suggest taking a break for you to pursue this other path, and if you’re wrong, you can come back, BUT if you’re certain that your crush is the person for you, don’t lead them on like this. Just remember to let them down easy and be compassionate; getting dumped is still getting dumped, even if there are no hard feelings.
You can’t control your feelings, which is why feeling this way is okay, but it’s also important to remember that with other people involved, you have to be careful. It’s okay (and in fact, necessary) to put your happiness first, but that doesn’t mean you should upset anyone else. Your current partner is bound to be upset about losing their significant other, but you can minimize that pain but being honest and upfront. As long as you don’t lead them on or put them down, I think that everything will work itself out. Good luck, and I hope the best for you, your partner, and your crush! :)