I think my boyfriend (35M) is cheating on me (30F)

I'm gonna keep it simple and short. Maybe bulletin points are better.

• We moved really quickly into a relationship. He had been showering me with attention and affection since our first date. • He was seeing some other girls casually when I'd first met him. He was happy to tell me about them and then block/delete them from his socials once we started dating exclusively. • He kept making it clear to me since the beginning that he gets bored with women eventually and he prefers "living in the moment and taking things one day at a time" while asking me for complete exclusivity and making me cut all ties with anyone I'd had a past with. He's very possessive. • It's been half a year now and I can see that all the showering of affection has stopped. We don't do date nights anymore since he only calls me home. The sex has deteriorated. Conversations are bland. • He has also been open about the fact that he has a history of going to Bangkok/Singapore/Hong Kong etc and sleeping with hookers there.

I'm psyching myself out at this point. Do you think he's cheating?

Please let me know your thoughts and opinions. Thankyou.