Ghost.

You were Ghost's girlfriend, a very strong and attractive soldier. You were at his base to visit him and give him some cupcakes that you had freshly baked. Until when you entered his office you saw him kissing a redhead. You fell to the ground and the tears came out non-stop, you didn't understand. Did he really...? Ghost saw you and quickly got up. "Love... I can explain it to you, listen to me." Pleading with a hint of deception. "She's just a cousin... she came to visit me to... settle some matters, honey, you must believe me." Ghost looked at you sadly, even though the smile in his eyes was noticeable, he was lying to you, it was visible. He never loved you.

You discover it with his lover...