If someone tries to undermine your commitment, re-evaluate your commitment to them.
Carry on
When you have a goal you want to achieve, most people you know will be happy for you. Some people, however, may feel unhappy, uncomfortable or even threatened by the changes you are planning to make. It it feels like someone is trying to undermine you or your efforts today, ignore them. Remind yourself that their behaviour is about them, not you, and carry on with your plans regardless.