Listen to this song and put your hand up every time you hear the sentence "I think she likes me".
Notice that we add an -S to LIKE because it's the 3rd person singular (he, she, it).

I think she likes me
And I know I like her
It's kind of frightening
'Cause it's too soon to be sure
I think she likes me
And maybe even might be love

Should I be patient?
Or should I ask her straight out?
That smile she gave me
Don't leave too much room for doubt
I think she likes me
And maybe even might be love

Our first kiss
Said more than good-night
I bet I relived it
A thousand times
And I can't predict
What the future's gonna bring
But those looks that she's been givin' me
Can only mean one thing

I think she likes me
I think she might be the one
And more than likely
The best is still yet to come
I think she likes me
And maybe even might be (love)