I lay awake in bed last night
just thinking about you.

i lay awake in bed last night
reminising what you put me through.

i lay awake in bed last night
furious at myself for remembering you.
^ Torturing myself with memories of you .

i lay awake in bed last night
hopelessly realizing, i still love you.

If i were you I would change up the first line , that really adds beauty to a poem .

Try this :
I lay awake in bed at night (1)
I lay awake in bed tonight (2)
I lay awake in bed all night (3)
I lay awake in bed last night (4)

Try out my suggestions and praise my comment if I helped you out !

Great job and also yeah HollyMarie's suggestion sound's good. i could help alot.