What should i do

so... my bf has been acting really distant lately and kinda strange. I thought he was just busy and had a bad day so I let it go. I just checked his snap score and it went up a lot. he rarely uses the app. that’s literally the only way I can tell if something is weird bc we both don’t have social media. I don’t wanna come across as crazy or something, but it does concern me a lot esp bc of the way hes acting. he also didn’t say good morning to me this morning, when he usually does everyday. what do I do