Does he really love me or is he infatuated?

i just met this guy at school and my friend told me after 2 or three days that he liked me. i thought he was nice so i gave him a chance. now we hav been together for almost a month. he tells me he loves me that im the most incredible girl he's met that we r going to b together forever and ever he treats me so amazing better than any guy has. but i read his emails and found messages from him and this girl the last message was from january he told her the same things that he did me i asked him about it and he said that that didnt matter that he thought he had wat he has wit me wit her but he didnt that he loves me he seems like a great guy but does he love me?