<human>: Could you distill the essence of the text into 1-3 sentences?

Redditors,how do you cope with insecurities? Those that eat at you and make you want to "rage quit" ? 

For contex purposes: I have been seeing this guy for a little bit(still not serious).Im 27,been single for 4yrs(by choice) and i think I really like him.

The problem is,despite knowing better,I feel like Iam 13 again. I cant not think about all these other options he has. And he has plenty. It makes me feel so insecure and nervous that I want to not see him at all just to avoid this pit ,and the anxiety. 

Now,I would naturally never say anything to him or make him feel uncomfortable about it,cause its my problem. Even if he was flirting ,it would still be..my problem.

So my question is, do you ever feel overpowering emotions of insecurity,inadequacy ,that make you want to run away from your relationship..And how do you cope with them ? 

Pls dont judge cause I wouldnt ask if I wasnt aware this was a problem. I just want to hear from people who have felt this way before.Thanks!
<bot>: Problems coping with overwhelming feelings of insecurity involving all the other options a guy I like has. Any advice ,except the obvious"dont" or someone feeling the same?