I have fucked / will continue to fuck all of my female friends, but sometimes I go long stretches without doing so when they get into relationships.
Let's say you have 12 female friends who are continually getting into relationships that last an average of about three years [36 months], that means that one will be breaking up every three months [36 ÷ 12 = 3].
So literally as long as I just wait around for one of them to become single, I have a continual stream of single female friends. The breakup time is particularly a good time, as I find they pursue men during this time.
It's the perfect setup that allows me to avoid dating websites and all that. Just wait until they come around to me, and have enough female friends on the go where that is a mathematical certainty.
So...while I may have been with all of my female friends, I also had platonic relationships with them for months/years while they get into relationships during those times.