Am I over thinking

I’m gonna start of with I feel like my boyfriend has to many female friends... he thinks I’m crazy for thinking that..but I feel like him and this coworker has something going on cause he gets mad at me for opening up a Female coworkers snapchat without knowing.. and today he was calling his work and she answered the know (nothing wrong with doing your job you know) but my boyfriend just starts making silly voices to her and having inside jokes with eachother and she’s laughing at every one of his jokes.. just to get his work schedule for this week am I over reacting or am I right for thinking something going on.. if you think something is going on tell me what you think it is I’m so nervous.. thanks

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