boy advice!!

so I've been kind of talking with this guy I used to talk to and I thought things were good and he told me he liked me and I like him, but lately he has been pushing me aside and I think he found another girl. It's killing me because he rarely talks to me, maybe messaging me 3 times a day when we used to talk all the time. I sent him a photo of my ass yesterday and he replied on snap with no text and I was like ok ??? It hurts because I don't get why he won't say anything to me instead it feels like he is almost ghosting me and idk what to do