What to do!?!?

Hey ladies! Well where do I start... I've been with my boyfriend for 3 years we both fell into a relationship after a horrible Break up with our ex's so I think we moved into a relationship to fast. But now he is always yelling at me saying he's f***** up cause of me and that I sleep with everyone and lie.. I trust him and just lately I been questioning his loyalty due to reading a saying

("the one always accusing is always the one doing" .....) Got me thinking... I've been honest I've shared my location at all times with him while he doesn't share his... I never touch my phone unless away from him and even then I'm doing nothing but texting him arguing with him about what I'm doing... I just need someone input on this situation... What should I do??? Thank you ladies for reading