It's okay if you liked it. If you didn't like it, talk to your partner about this. It's unhealthy if you don't enjoy sex. If they aren't your partner then it shouldn't be allowed

There's no formula for happiness. Do what you think is healthy. Stay hydrated, exercise, pay attention to friends and try to invest in healthy friendships. Learn some employable skills so that you can be financially independent and just stay up. Your existence itself gives you enough of a right to be happy