PLEASE AWNSER***NEED ADVICE ***?

ok so i have a boyfriend & his name is tyler & we havinq been datinq for kinda a while & he has a ex named lauren & we all live in the same neighborhood so we all see each other & he still sees lauren & i see him . well lauren dosent like me & she told my friend victoria to tell me that tyler said that he would rather go out with her than me !! soo i txted tyler & he said that he never said tht . he said that she was lying (which i believed ) . well ... later today (not to long ago ) he tell me that he is gonna sleep over laurens house !!!!!!!!!!!!!!!!!!! & he asked me if that was bad which i lied & said no i know im stupidd ! but i love him !! & now i believe more that he did say that ! i have already txted him & told him how i felt but he hasnt awnsered !! what should i do !! & please just explain why !! if there is anyone that is having boyfriend problems i would like to talk to u : ) ! but i mean im just scared !