should i take the risk??

i’m currently 11 weeks pregnant i’ve been staying at my boyfriends place i still have a home with my grandma. i feel like he’s cheating on me i really want to go through his phone like really bad . i’ve just been crying all day because i have no one i feel so alone. my mom is not in my life my dad passed away i don’t really talk to my siblings so it’s really just me and my bf. i honestly really love him but i don’t think he feels the same for me if i find out he’s cheating he won’t see or hear from me until the baby is born which is mid february. we’ve been together for 2 years i just don’t know what to do i don’t have any friends to talk to