How do I handle this situation maturely?

I have been getting these really random intuitions that something is off with my boyfriend. I have no proof and even when I bring up these random feelings, he gets mad.
Well, he has a child and I know that the child’s mother’s birthday is around Mother’s Day. For some reason I have been getting this weird feeling that they are messing around and I kept telling me myself if he goes anywhere around that time- it has to be the universe telling me something. Little behold, he tells me that he has to go on a work trip for 4 days during that time. I didn’t say anything. Instead- I acted like i was fine and to continued to observe and pay attention. Maybe it’s me or my intuition is right. I asked him where he was going and he gave me 2 options. Both options made me feel that he can possibly go to a water park.
The next day he talks about how he wants him and I to go on a a trip, which he names the exact water park I assumed he might go if it’s a family trip instead of a romantic getaway. He then starts talking about resorts that him and I should go on because I deserve to be appreciated. In reality, I feel like he feels guilty for what he is doing.
Again- I don’t have proof of anything but I’m bothered the possibility. I want to talk to him but I don't know what to say?
Do I start off with I have trust issues? Like, I don’t want to argue but I also don’t want to act like I don’t think he’s going on a trip with his ex. I feel played, silly, so many things.
How do I handle this situation maturely?
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