Begging is so unattractive. I have recurring nightmares of me begging my exes to return, then realizing the reason we broke up before is still there, and then having to break up again after I begged them to come back. Literally recurring nightmares! Three exes! Please do not start down this path! Deal with this now - WHO (from your past) are you REALLY begging?
ETA: oops! I agree with bluemountains- I didn't mean to ask her, I meant to wait it out, work it out with new T. deal with the ISSUE now, going back to old T would be avoiding it, imo.