feeling lost

I'm at this weird place in my life where I feel completely alone even when I'm in a room full of people. I have a million things running through my brain. some days I feel like I am about to just break down emotionally, I really don't know why or how I've made it this far "mentally" when I've been getting my heart broken since age 16. I feel defeated like I'm not even good enough to marry. I just turned 26 yesterday and I honestly feel like I haven't accoumplished half of the things I could've at this point. I don't know what's wrong with me I pray pray and pray again but I still feel as lost as I ever have.