Replying to Am i a bad boyfriend?

k well right now i feel like shit so you tell me cuz i really dont know, heres the story.

So im been going out with her for about 2 months now. Iv been her first for everything so far.(im 16, same with her)

And so for our relationship shes said to me alot i love you. and she really does mean it when she says it because iv been her first for everything. When she says it iv said it back to her but everytime iv said it i feel like a dick because i know i dont really mean. it. I know forsure i can mean it but for now its to early to say it and when i wanted to say it i wanted to mean it. Today she challenge me on it and said do you really mean it. and i told her i dont want to lie so i told her i felt pressured into saying these things and i was not sure what to do.

So now she feels as if she needs to back off. And i dont know what to do. cuz i really like her but i have no idea what to do. cuz before i didnt have the balls to tell her cuz i didnt want to hurt her.

and i know its some highschool relationship but w.e help me out

am i a dick? if soo wtf should i do