Need some motivation/advice

I am struggling a lot with life right now. I am 35 F (still single) and I can't seem to find the confidence to date. Physically I am attractive, I have a successful career and a good personality. But emotionally, I am so beat down by life. I live at home with my addict/depressed brother and we are both taking care of my chronically ill father. Since my 20s, I have always been taking care of someone.. my mom who past away from cancer, my brother who is in and our of rehabs and my terminally ill dad. All the while, I have a successful job, I am financially secure and I try to maintain somewhat of a social life. I am so lonely and I don't seem to have the emotional energy to date. Honestly, the dating world is not kind and its hard to find someone who will be emotionally supportive for me. So for those in my situation, what do you do? I am thinking about giving up and just say fuck it. In this lifetime, I will be alone. I think I have enough brownie points accumulated from this lifetime that the next one should be a lot better.