You need to just shut the door and never open again. You need to close relation on a good note and telling the correct reason that why you want to leave?
Because leaving someone with giving a valid reason to someone feels painful. And, if you think they don't give a shit to you at all and they don't care whether you leave or stay. You just need to say a goodbye and never open the doors again.
Don't keep contact with anyone forcefully, because when you try to keep relation forcefully, Remember each and everyday you're loosing a little of your self respect and at last they become your addiction and they don't care for it. They don't give a shit to you and your feelings.
Stay away and maintain distance if you're facing this kind of situation and really not getting the same things back from them you're pouring for them.
In my point of view, It's not at all selfish to love yourself. Infact It is really important to love yourself. If a person doesn't only love himself/herself how can he/she love others. Loving yourself boosts your self esteem and self confidence. It would help you believe in yourself and make you take decisions in your life by yourself. A person who loves himself/herself would be loved by others also because of his/her charming personality and that's a different kind of feeling.
Self love is about caring for yourself, your mental health, taking time to rest, doing whatever is good for your soul and inner peace, making yourself and your happiness - a priority, refuel your energy.
Self care is never a selfish act and yes you're the best. Admire yourself.❤️
Maturity is not about talking 24x7 with your partner but understanding that everyone needs their personal space too. It's not about exchanging gifts but making little efforts daily for your beloved. Maturity is when both of you communicate the good as well as bad things rather than walking out of a fight angrily. It's about being a support system for each other. Maturity is about understanding that there is no 'I' or 'You' in relation but 'We' and 'Us'. It's all about being a friend, a second parent, a teacher, a best friend and of course a partner for life.❤️