<human>: Can you give me a shortened version of the text?

I met him about 5 months ago but he and I don't call each other boyfriend/girlfriend.

He and I have sex whenever we see each other (we see each other 1-3 times every 2 weeks). We have recently started holding hands and during sex, when he talks dirty he will say "you're mine now." I'm not sure if he's only saying that just during sex but I personally have implied it to our relationship as well :P (not sure if I shouldn't?) But even in texts, he will tell me he misses me and compliments me.

He admitted that he used to sleep around. I have heard rumors about him as well, but I don't judge people on their sexual history so I tried not to judge him. When I asked him about 2 months ago if he was sleeping around his response was "No... but I could see why you would think that." 

I'd be lying if I said I wasn't paranoid. I'm starting to feel like he is sleeping around with other girls. Recently, I borrowed his phone for a bit to make a call. Within that time, I saw that he got 2 snapchats and a text from a girl. I thought of it as nothing much, because he has a lot of girl friends.

I grew increasingly paranoid about it the last few days, and went on his facebook profile to find out that the same girl posted a picture of them together at a museum and the movie theatre in the same day. I don't know about you, but a museum and movie sounds like a date-kinda thing. I realized that he didn't text me at all that day either, when we usually text the whole day. 

I don't know if it's worth bringing up- I don't want to sound like I am accusing him or sound like I am clingy or like I am some sort of stalker.. 

The thing that stops me from asking him is that we're not exclusive.. We've never agreed to be. Is being exclusive to each other implied? I'm so confused.

Help! Thoughts? What should I do?
<bot>: the guy I'm sleeping with might be seeing other girls. We might not be on the same page but I dont want to ask because I don't want to come off as accusing/clingy/stalkerish