"Love" must never be allowed to excuse emotional or physical abuse. Treat his more recent approaches to you as sensitively and sympathetically as he treated you - ignore them utterly. If he comes to your workplace, have Securioty remove him and inform him that you will obtain a restraining order from court to forbid him from contacting or approaching you in any way, if he persists.
this is really no about "forgiveness" a hugely over-rated concept. Its about him wanting to re-enter a situation that will enable him to resume the abuse.
His therapist is wrong to expect you to involve yourself in his therapy ( if indeed that is what he is doing ) , and should be told to leave you out of the process, or face a formal complaint of misconduct on his part.
Work with your own therapist to move ahead, and just to get this in proportion and break the bad habit of being in any relationship with this guy - its not necessary to totally forget about him, just to recall him if at all, without emotion or being troubled by it.
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