My boyfriend has always been an independent person and sometimes needs time to himself, but that happens every two months or so. Lately it's been every other week. What do I ask, or do?

Find a time to talk to him and check in. Don't accuse him of cheating - just try asking, "I noticed you've been taking a lot more time to yourself lately. Is there something going on that you want to talk about?" It's possible that there's another problem, such as work, mental health, or family problems, that's causing the change in behavior, or he may not have even realized he was taking more time alone. However, if he gets defensive, starts yelling at you, or accuses you of not trusting him, that could be a sign that there's something he's hiding from you that he may feel guilty about.