Needing alittle help here.

How do I tell this guy how I feel about him? He wants to know and I don’t know what to say. We’ve been dating for 2 weeks and we already say I love you too each other. I really like this guy a lot and want to move forward with him in my life but idk how to explain it to him. Idk what to say. Help!! Btw I’m 18 and he’s 20