I can't even have eye contact with my crush?

I've done two tours overseas in thr military and I'm was a state level Boxing champion
But I can't even look at her eyes for a second and I feel so insecure... and this makes me feel emasculated cause I know that woman won't be attracted towards a less confident insecure person like this
I need help
Updates
1 y
She's a nurse
I can't even have eye contact with my crush?
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