Thoughts on "parent yourself" advice? How to go about that?

I struggle with chronic loneliness, I notice a pattern of getting attached quickly and strongly to one person and subconsciously depend on them to help me regulate my emotions. I find I have a near impossible time regulating myself, and things feel very out of control emotionally and out of proportion. I lost my dad as a kid, and didnt have a great relationship with him, so I have daddy issues. I left a toxic relationship recently and after examining, I feel I used that relationship as a means to "find" my father again. I was seeking his hugs, the comfort he brought me. I dont even miss my ex, I miss what he occasionally offered me. I really really miss the physical affection. Im so lonely. I cry when I think back to my last relationship, and it spirals down to "i miss and want my dad". I see online that in order to heal this wound of mine causing me to want to seek out an almost parental figure in my relationships is to parent myself, take care of my body, all that happy horse shit.

how? how do I do that with executive dysfunction? with my Interoception issues? I find i forget to drink water or eat food when Im alone, or use the bathroom even. How do I parent the physical needs I have? Do I caress myself? Hug myself? cup my own face? that sounds embarassing to me, like I should be ashamed. I sometimes wake to find myself caressing my body in my sleeps a soft gentle touch that I love to receive. I miss sex, but I cant masturbate, my body wont get going, and the times I can I just sob afterwards. I miss being intimate, how do I parent that? do I just cry until i forget this pain again? i dont know how to process and heal, ive been dealing with this for a decade now, Id like to be over it now