In order for the guitar to sound like the pianno from the studio version, play with fingers like this:
C Am Em
e|--3--3--3--3--|--3--3--3--3--|--3--3--3--3--|--3--3--3--3--|
B|--1-----------|--1-----------|--0-----------|--------------|
G|--0-----------|--2-----------|--0-----------|--------------|
D|--------------|--------------|--------------|--------------|
A|--3-----------|--0-----------|--------------|--------------|
E|--------------|--------------|--0-----------|--------------|
[Chorus]
C
Mmm, baby, I don't understand this
Am
You're changing, I can't stand it
Em
My heart can't take this damage
Em
And the way I feel, can't stand it
C
Mmm, baby, I don't understand this
Am
You're changing, I can't stand it
Em
My heart can't take this damage
Em
And the way I feel, can't stand it
C
Mmm, baby, I don't understand it
[Bridge]
Am
Girl, you're making it hard for me
Em
Girl, you're making it hard for me
Em
Girl, you're making it hard for me, uh
C
Girl, you're making it hard for me
Am
Girl, you're making it hard for me
Em
Girl, you're making it hard for me
[Chorus]
C
Mmm, baby, I don't understand this
Am
You're changing, I can't stand it
Em
My heart can't take this damage
Em
And the way I feel, can't stand it
C
Mmm, baby, I don't understand this
Am
You're changing, I can't stand it
Em
My heart can't take this damage
Em
And the way I feel, can't stand it
C
Mmm, baby, I don't understand this
Am
You're changing, I can't stand it
Em
My heart can't take this damage
Em
And the way I feel, can't stand it
Mmm, baby, I don't understand it
Source: https://tabs.ultimate-guitar.com/tab/xxxtentacion/changes_chords_2332481