Saying i love you

I’ve been dating this kid for a month and some days now and i know it’s not a long time but we talked for a while. I have never felt this way about anyone and the only way i can explain it is to tell him i love him but i don’t want to say it first but waiting for him to say it first is painful. He knows something is on my mind and he keeps telling me to tell him but I’m scared to let someone in again. I just don’t know what to do.