My boyfriend is very anxious and nervous, what to do?

He refuses any psychological help, i bought some valeriana calm pills

He has this thing when something worries him he can't stop thibking about it in a negative way, so negative so fatalist, so pesimistic. His health is horrible due to all the stress he himself causes by overthinking

I said its contrproductive to worry about everything, need to focus on what can be solved, do not panic

I try to be supportuve and calm, he is very impulsive

But he drains my energy

How can i help him?

My boyfriend is very anxious and nervous, what to do?
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