So I'm working on the song Always with me. and I have a question

At the Em Chord, there're both a half note and a quarter note at the same time, then there's a half note, then a quarter again. How am I supposed to play these three? Just from left to right?
Don't pull off though. I would lift the finger slightly after you've held the B for a quarter note. This will deaden the string in time to the music.
At beat 1, you play the E and the B together. At beat 2, you play the E at the 2nd fret, 4th string, while leaving the B ringing. At beat 3, you play the B again leaving the E ringing. That's it. Hope this helps.