Please help me!

For the past month or so, I’ve been really anxious and small things have been setting me off… usually these triggers have something to do with me thinking my boyfriend doesn’t love me anymore or that my boyfriend and best friend are flirting in front of me. I know both aren’t true, my boyfriend had a very flirtatious personality where by him simply being nice to a girl it can appear as tho he’s flirting, and a while ago I confronted my best friend about this topic, because I was convinced she had a crush on him and she said that she doesn’t and would let me know if she did, plus she sees him like a brother. But for some reason no matter how hard I try to make myself get past this I can’t… i thought I had for a few days but I saw them again after a couple of weeks away from each other and the feelings came back… like it’s so bad that it affects my ability to socialise with them and our other friends at school, they all can tell something is wrong when I say I’m fine and I want to explain it but I know I’m being over dramatic… however I feel like maybe I might be able to move past it better if I do talk to them about it but I’m worried about making them mad… cause they know I know they’d never do that to me…

Please please please help me… I really want to move past this so I can be okay again