You've received much needed validation from other posters - which I agree with.
Here's a different angle that I do not intended as invalidating - so please read it as "perspective taking":
Clearly, your Mom loves you - and loves you enough to reach out to you...yet again. For that alone, she deserves some praise. She could have dropped you like a hot potato - and you'll know that untold numbers of JW mothers (and fathers) have done just that in response to their "unrepentant" offspring. Your Mom possesses some sterling qualities.
I'm not trying to minimize the pain you are feeling - but it is worth keeping in mind the fundamental notion that at some deeper level she must admire the man - the son - you are to beseech you to return to where she believes you are needed.
Call it emotional blackmail, yes; but she sounds like a mother who is solidly committed to her children and ensuring they get what (she believes) they need to be well and do well. Again, it sure is suffocating and manipulative in its impact, but the intent of good responsible parenting is there.
To get an even wider perspective, there are parents who are so blithely indifferent to what their children do, the children's pain is one of feeling neglected and deprived.
Whatever the outcome as time passes, your dear mother has at least made it clear how you can make her truly happy. That does not mean you capitulate; it means you keep your pain in perspective. The world is full of resentful sons living their sorry lives to please their well-meaning mothers. It's sobering for those of us from a JW background to remind ourselves that by far the overwhelming proportion of those well-meaning mothers (and fathers) are not JWs but espouse other beliefs for their "stand".
Go well and be true to yourself and live life by your dearest values (which undoubtedly reflect your mother and father's qualities. That, in the longer term, would ultimately make most mothers proud of their offspring, even if in your case you do not immediately or ultimately see the result in your mother that you so long for. Best.