<human>: Can you give me a shortened version of the text?

I think my girlfriend of one year is cheating on me due to some things she's posted on r/sex, r/gonewild, etc. on r/ sex She had said around one month ago that she was currently single with three "friends with benefits". And it was about them trying to make her squirt in vivid detail. She doesn't know i've been looking at her reddit and if i brought it up she'd probably get pissed. We've also been having sex for quite a while, if that contributes to anything... if she's fucking three other guys i wanna know not just for fidelity issues but also for health reasons (STD risk)Any suggestions should i worry about it? If she is cheating what do i do?
<bot>: How can i tell if she's cheating or not? What do i do if she is? Should i even bother?