To the men here, what would make you feel insecure when being near a certain woman?

When she regularly walks her dog and happens to go past every time I go out to my vehicle parked in the street or into my front yard doing yard-work and seemingly has to say something to me that requires a response to be neighborly, and SWMBO sees nothing wrong with her older neighbor talking to me "because she is just being neighborly" (cringe)

for me insecure is wrong word, i get the hypothetical nature of the question however thats not a feeling i have around others

My quiet voice. I find that my vocal chords are often weak because I rarely use them.

If a guy is insecure, it will manifest in lots of interactions but esp if he is attracted/interested. He's used to rejection but hoping this interaction doesn't end the same way.
The insecurity comes from guys caring too much, being almost dependent on others for happiness. If you have a guy that is confident in himself, he won't be insecure, bc it won't matter to him if your interaction turns south.

Why would I even be near her in that case?

Now that I’m married to one, nothing.

Nah.. I gots a strong pimp hand.

Being near her.

Everything

If she is holding a colt 45.