Kinda jealous about girlfriend?

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I hate looking on Instagram or Facebook when my girlfriend post pictures of herself because she always gets tons of likes from a million different guys and a million compliments and I hate seeing that stuff because it makes me a feel a little jealous, or a lot jealous even though I know I have a lot of stuff they can't get from her but I feel really "left out" I guess. I NEVER will tell her I feel like this or do anything because it's kindof a stupid thing to so but am I the only one who feels like this? And I don't know what to do. How should I take care of theses feelings