Instead of trying to stop the anxiety, you could acknowledge and examine it.

But not let it keep you from your goals.

You could say "Ah anxiety, here you are again. You always show up when he is with his friend." You could then carry on with your life, sort of towing the anxiety along.

And not judge yourself for it.

If anxiety is becoming an increasing issue, would you consider seeing a therapist about it? There are many ways to treat anxiety.