I am sorry to read about your difficulties.
Regrettably, you need to play the office politics for your survival. Eventhough you feel like a sellout, you are doing what you have to do and nothing more regardless of what a co-worker thinks or feels. You have to protect yourself and your own job. Your co-worker's hurt feelings should be the least of your worries.
You sound like my husband (who is usually right but don't tell him I said that!)
Thanks for that dose of reality
You are quite Welcome!
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Thank you very much for your cooperation,