3 months in Relationship

Hey! I need some advice/suggestion/anything you might think is going rn. My bf and I met online through instagram...and have been in a relationship for 3 months now. At first he used to give back the same energy (like texting and calls) but after a month or so, all of that texting and calls stopped yk...but he sends me reels all the time. Although he says he is pretty busy all day. But he sends like lots and lots of reels. I feel like he is not interested in me anymore. What do you think is going on...or am I overthinking too much:,)