So you are late 30's too? It does seem hopeless at our age yes?
The dynamics of a relationship are different for us. We have to accept that prospects are going to have more baggage, be more busy, and most of us are the product of failed marriages.
Getting into a serious relationship is going to take more work. Not that I know what to do myself cause though I have no problems finding dates, anything serious seems to elude.
Men and women can equally share the blame for jerking each other around.
Always remember that YOU are the most important person in your world.