Your FU was not disclosing that info earlier without being asked. IMHO you would be disservicing yourself by letting go of two people who are so special to you to avoid 'possible' discomfort in future relationships. Just be upfront from now on and let people decide for themselves if they are secure with you still maintaining friendships with ppl you have a srxual history with. As long as you are no longer keeping secrets I don't see how this would be a problem going forward.