At a party yesterday
Saw the room where you and me
Had some fun
You thought it was love
Now I'm stuck here reminiscing

And I try day and night
Oh, to somehow draw a line
Wanna cross it all the time

I think I'm mentally cheating
How could I be so disobedient?
I'm just eighteen, don't have experience
Can't help the fact that I caught feelings, oh

I think I'm mentally cheating, oh
Cheating
Cheating, oh
I think I mentally cheating, oh
Cheating
Cheating

I think I shouldn't be looking in those eyes
Why do they give me butterflies?
Can't express how obsessed
Is it purely the attention?
I'm just trying to decide
If I stay, I'd have to lie
To myself, feels like hell
To be in love with someone else

And I try day and night
Oh, to somehow draw a line
Wanna cross it all the time

I think I'm mentally cheating
How could I be so disobedient? (Oh)
I'm just eighteen, don't have experience
Can't help the fact that I caught feelings, oh (Oh)

I think I'm mentally cheating, oh
Cheating
Cheating, oh
I think I mentally cheating, oh
Cheating
Cheating

So goodbye, I'm out of time
Only said I love you twice
I know that is not a crime
I need more to keep you mine
So goodbye, it's alright
Baby, it's a part of life
Something's gotta sacrifice

I think I'm mentally cheating (Oh)
How could I be so disobedient? (How could it be so good?)
I'm just eighteen, don't have experience (I'm all done, don't wanna feel this)
Can't help the fact that I caught feelings, oh

I think I'm mentally
Oh, cheating, oh
Cheating (Oh, it gets old)
Cheating, oh (Yeah, yeah, yeah)
Mentally cheating, oh
Cheating
Cheating
I think I'm mentally cheating