Leaving A Relationship

I know Brooke says never leave a relationship in hopes that is what is going to make everything better. She also says people are just there to love and you need to take care of your own needs. What happens when your partner seems to always need you to fill their needs and when you aren’t doing well you get no support from them? In fact you have to hide your emotions in order to appease her. I’ve been going through a tough time right now. I know it is all my thoughts creating it, but I’m struggling to find new thoughts. I don’t show up well and when I’m home I want to be able to just collapse but I can’t. I have to keep it together in order to not upset my partner. Last night we had an argument because I she feels I don’t show her enough love. I’ve been caught up in my shit so I haven’t been very present and haven’t been giving her the attention she craves. I just don’t have it in me. I have nothing more to give right now. Then I ask myself why do I need this relationship? It gives me nothing in return. Is this how it is suppose to be?