Cas honestly really fuckin wants to go after him
Cas: ...I...I should hate you. But...I...I don't. To be completely honest, right now all I want to do is grab you by your shirt and kiss you-I wish...I just-I wish things were different but...in the end, you-you're always gonna choose him. And he...he's always gonna want you...and I-I hate how powerless he makes me feel I just...just-just know that...if you wanted me-if you really wanted me...I would stay.
He starts to walk away