There's a great book From "Misery to Meaning - the middle passage" by James Hollis. He is a Jungian therapist but you can get a huge amount of understanding and peace from the book regardless of that.
Life is hard. Being a conscious animal is damn hard. I have many times felt overwhelmed by the pointlessness of it all, despite having DC etc - and I was diagnosed with depression. Since taking antidepressants I felt immensely better. One of the things about depression is you can so easily find (negative) reasons for not taking pills and the irony is that once you do start taking them, you realise how self-defeating you were to not want to take them. Anti depressants have if not saved my life, certainly enabled me to live my life more happily and with less suffering. If you've got to get through life, don't suffer unless you have to.
Yes to a dog. Yes to going the whole hog- from flowers to an allotment, from night after night "in" to repainting you're living space. From dancing alone in the kitchen to jointing a 5rhythms group. From miserable journaling to writing your life story in Felt tip on your bathroom walls. If you want more men in your life, go where the men are - car maintenance, gliding, cycling, golf, football,
Whatever you do when you feel particularly low, DO NOT SIT DOWN. Sit, and the day is lost.
You're not alone. You're not pointless or mad or unlovable. You have been dealt a crap hand of cards with which to play the game but that doesn't mean you are a crap player or not welcome in the game.