How often does he contact you between the dates? Is it at least daily? I’d pay attention to how he communicates with others. If he talks to his buddies all day but not you, then it’s a red flag but if he doesn’t talk to anyone much, then it’s just his personality. Not into calling or texting people much

Also it’s ok to bring it up. Some men aren’t sure how much is too much and don’t know if frequent communication would be bothersome to a woman. He also might be careful in regards to getting too serious since he’s not interested in commitment (cohabitation). I think it’s ok to discuss all that before you become frustrated in lack of whatever is lacking