[bjourne]

The way you are describing your situation reveals some immaturity on your part in relation to your leadership role. As a project manager, it is your job to make things work and to deal with "difficult" coworkers. Remember that people aren't "difficult" per se, most want to do a good job and they may have rational reason for acting in certain ways.

You should talk to your coworker. And you should realize that perhaps you have contributed to your work-relationship having deteriorated. It may not be all on them.

[throwawaydev123]

Yes, I agree, it's not all on them and this is a learning opportunity for me as well.