How do I keep it so my ears don't close up?

If it's a new piercing, keep the starter earrings in for six weeks. Then switch to other earrings, but keep them in at all times for six months. Afterwards, it should be safe to take them out. It's recommended that you wear a pair at least once a week to prevent the hole from closing up. However, for some, the holes may quickly close up if earrings aren't worn on a daily basis. If you've recently reopened your piercings, wear your earrings for a few days, and keep twisting them to keep the hole open. If you're worried that they might close up, you could also wear them to sleep. After that, it might be safe to occasionally remove them.