Need advice !?

Alexa • Mixed shorty 💓 with attitude 😋😘
My boyfriend & I have been together for a year & six mouths. He has this ex he talks to & I always feel that they are being flirty & stuff. I'm always assuming things. & I hate it when he talks to girls because I'm scared he will cheat on me. ( he hasn't ever ) just in all my other relationships that always happens to me. I don't what to do because I trust him I just don't trust these girls around him. 😩