Could he be too good to be true?

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My bf is,I could say a good person.He is so sweet,caring and understanding...I mean at a near extreme.He is so down to earth despite his academic and professional achievements.He is so hard-working to provide for his own family and he says everything he does is for our future.He is a gentleman,he never pushes me into things that I couldn't give him out of wedlock.Whenever someone insulted or wronged him,I even get mad at him because he's not there to defend himself a bit.He says that,ignorance is the greatest revenge you could ever do to your detractors.He constantly affirms that I am the only girl he could ever fall for(I'm his first gf by the way at age 22).He is honest and transparent about the things he do..he even gave his fb account and password to me telling me the I could look at it whenever I want (even his cp,he could just be so willing to have me inspect it )He never mind if it compromises his health the way he cares for me(he fetch me from my house to my office everyday and it means waking up at 4AM everyday!).He said he could risk his life.Whenever I get fussy about things and every evidence points it were all my fault,he would be the first to say sorry.I remember 30 mins.is the longest time he's angry.

I know these are some I should be happy and thankful about but it makes me afraid sometimes that he is just too good to be true.I worry that he might just change into someone so different someday.
Are my worries valid?Is he too good to be true and lasting???