So me and my boyfriend have been together almost 4 years and recently I joined the same company as him ( in different sections so we don’t always see eachother I’m in promotions and he works inside the club on bar)

I’ve been enjoying it until recently I’ve noticed his co worker - let’s call her Jess is being abit flirty with him.

Jess is rude to me the times I’ve spoke to her and she’s constantly messaging my boyfriend on social media and taking photos with him at work and taking photos of my boyfriend and his guy work mates and saying “cute” and that she’s always there for him blah blah when he’s never mentioned any issues with me so is he telling her stuff he’s not telling me ? I don’t like it lets just say that it’s making me uncomfortable.

He’s spoke about her quite a few times to me too.

I snooped through his phone which is soo wrong I know but I just had a gut feeling telling me to and I seen all the photos of them at work and whatever and I’m just not feeling good about it

I know he’s messaging her back and whatever so it’s not all Jess.. which worries me :/ he don’t really do this with anyone else at work and I understand he can have female friends but somethings not ringing right with this one ! Do I approach him about it or is it just innocent and I’m overthinking ? please help a girl out I feel I’m going crazy