IB You have no idea until later how much our children watch us, and how important it is for us to set an example to them of upright and adult behaviour. As you are doing - an example to all.
It is very disturbing for young adults [and I count your son as that] to watch a parent behaving inappropriately, particularly sexually. If you started dating you son might find it disturbing.
I know we have our own lives to lead, but sometimes we have to pt our own natural inclinatoins on hold, as you know.
And if you aren't ready, you aren't ready, but even if you were, without wishing to be a killjoy, I would say be very careful here for your son's sake. These kids have been through enough. And if you did meet the right person he would wait!! But you know all of that, I am just affirming you.