Hm… being twice married, and living now for over 13 years alone and the last five with no boyfriend at all, I can tell you that the best decision is whatever you choose is the best for yourself. I am not looking for anyone and jokingly say: I do not want to riun anybody’s life and I am not looking for an another “victim” to love just because love is a good feeling. Sometimes better to live alone than with husband/partner and feeling the same loneliness and emptiness inside. Men around my age (40–50) go dating just for having free sex and rarely for a serious partnership and when they see that you are not ready to go to and have sex with them after first date they just leave (it is still OK but sometimes you receive “nice” messages, pointing on your possible disability etc.) (sad experience and removal of the profile from a dating site) — and I think I am still capable to love but not capable hunting for an object.
Polyamory? Remembering the late Robin Gibb, who passed away few years ago and left a lovechild named Snow Robin. He fathered a child not long before his death to his mistress — deeply hurting to his wife Dwina. So your polyamory is good for you but maybe not for the people wo around you — and finally the innocent children shall bear all the consequences.