Hi and welcome to PC. I look forward to posting to you and perhaps chatting in our chat room.
To put this concisely...and in clear terms, (because I can be longwinded)

I would advise you to find someone who is completely unattached.I am well over a half-century yrs/old and I have seen such drama..and situation after situation. I do consider myself a pretty good judge on love & relationships.
TWFD...you also deserve the best that life can offer you. Getting involved in this situation will most likely bring you much unhappiness. Good luck to you.
~Dottie