Wait, what did he text you that seemed like a joke? Is there any chance you could have misunderstood it? (feel free to PM me if you'd rather not post it)

It just seems like he's been really caring and supportive of you, so I find it hard to believe he'd joke about something that had upset you so much. If he did, I'm so sorry...I hope you'll at least try to talk to him about it to let him know how much it hurt you.