M.G.
I read your earlier post. So you've been texting him and he hasn't replied.
You don't know why he's not texting back. So your imagination is going full tilt.
I think you said earlier you knew he'd received them.
If it were me, I wouldn't send any MORE texts. Let it go - put the phone down now.
I would just focus on enjoying yourself while he's away. Make plans with friends.
He should check in (yes). Would I address it - Honestly, if you have to ask a guy to text you once in a while - then he's not a great guy. It's like asking someone to be kind to you. If you have to ask, then there's your answer ...
Sometimes we give the power to the guy when we have it ourselves is what I'm saying. Don't sit and stew while he's on vacation enjoying himself. You don't have to put up with it is what I'm saying. Don't be the insecure gal who doesn't trust him. If he's been a jerk to in the past - there are lots of nice guys out there.
Sorry - not what you were asking, but someone once gave me that great advice and it was good advice.