I (25F), was speaking to my coworker (27M), about his relationship (he brought it up not me). Started to talk about how he has never really been in love with his gf, but cares for her, as well as things like he cannot imagine a future with her and made a joke that he'd like to switch his partner. Apparently they have an "open relationship". When I asked "does she love you?" he replied "I am afraid so". Up until this point I liked this guy (platonically) but now I am just confused. I haven't known him for long. Today, he posted a few pictures of his gf on social media, captioning "My love etc.". I am so perplexed. He mentioned not many people at the workplace know of personal details about him, and they have known him for much longer than I.