Most Helpful Guy
I can make this one easy. There is no such thing as "normal." What counts is what you are comfortable with as a couple. If it makes you uncomfortable that he texts someone regularly, then you should have a talk with him about it. If they are just friends, then maybe it is acceptable to you. But I would be wary of a guy who texts a girl so often. It's possible there is something else going on beyond friendship. Then again that isn't necessarily the case. You have to use your own judgement to decide if you can trust him or not and either accept it, or don't accept it based on how you feel after the discussion. Only you can decide if it's a "problem" for your relationship or not. There is no "normal."
Most Helpful Girl
Girly, this does sound a little dodgy.
You can immediately go assuming he’s cheating or thinking bout it. But you can’t ignore it.
The only way you’re gunna know the truth is if you ask him... DONT accuse him! Just bring it up and say you don’t want to make it seem like you don’t trust him but there are thoughts in your head that you just need some reassurance about... if he gets defensive and insulted that you would think he would ever do that then try explain calmly that he would probably start having the same insecurity if you suddenly reconnected to an ex and started talking all the time.
If he loves you tho l, he shouldn’t care too much that you asked
Better to be open than closed