I’m giving up😞

So I’m 3 months pregnant and me and my boyfriend argue almost every day. I have this feeling he’s cheating on me, just like the way he acts and treats me. I’ve even had dreams about it. I’m sick and tired of him wanting to argue with me I love him so much and I want to raise the baby with him but it’s him. He’s been hiding his phone also. I don’t know what to do I’m sick of it I do so much for him I try to make him happy. I wanna leave but it’s the baby.