Boyfriend issues?!?!?!?

me and my boyfriend have been going out for about 3 months. we really lke each other but i think hes cheating on me.... you see he lives in my neighborhood so i walked down to his house and he was all shocked to see me then was like looking to the right of him and lke why r u hear and i was lke u wanna hang out then hes lke i hve to go and left. i texted and cslled him later but hes just lke not right now.... idk whts going on? i might just be paranoid but>>