I start overanlyzing and reading into things too when stuff like this happens. Did he text you back immediately at the start of the relationship and things have changed? If that is the case, I personally would also feel a little insecure about things being different as well which I don't think is healthy but I've done it in the past too.

I don't know the situation, but it seems like you might be texting him and waiting by your phone for a response. If you can, send him a text and do something to take your mind off of it. Listen to music, read, go on a walk, go shopping, etc. If you have a lot of time on your hands like I do sometimes, I can get a bit obsessive about things like that.

Guys are just so different from us. They truly do things on their time and aren't thinking about stuff like oh if I don't text her back immediately she is going to be sensitive. They are cave men honey. They don't think like we do and from the little I've heard I don't think he's doing anything to intentionally hurt you. He's just being a guy.

Can you also text him less? Do you feel comfortable putting the ball in his court and letting him initiate the texting more? Keep yourself as busy as possible and make plans with friends and fit him into your schedule. It will help take your mind off this stuff.

How often do you text him? Can you place a quick call to him instead? Sometimes texts can be misinterpreted and if you have a conversation you can hear tone of voice, etc.

I'm no pro at this stuff but that's my two cents. Good luck!