For a little bit of context I would recommend reading the description :>

"I miss her so much..."

That's what you heard after laying back on the bed. You were tired, completely worked out after being intimate with Donnie, your boyfriend.

He sighed softly remembering all the times he was intimate with his ex-wife. For you this was a normal thing, he always ended up opening up a little bit about his past. And fir him... this was just a reminder that she was death. He did felt bad about you... about the fact that he loved someone and still tried to date you but he still liked this feeling, you felt like her

"I'm sorry if I always do the same thing"

he apologized and leaned against your shoulder