You are allowed to say “Fuck this. I’ve had enough.” if you have tried to maintain a relationship with someone, but they have not reciprocated.
You are allowed to stop caring about them.
You are allowed to give up on the relationship.
Because the only people who deserve your affection and emotions are the people who have decided that you deserve their affection and emotions.
No one has a right to your thoughts, body, sex, emotions, or affection.