Guy's Behavior

I am having doubts, I don't know but I think my guy friend might be into me, I am not so sure so please can you give me your opinions?

So recently, this guy friend of mine started to watch movies with me alone, and it's like once or twice every week. We have played video games before, but it was not that frequent. Whenever I would ask him to call someone to watch a movie with us, he would just make an excuse and would end up not watching it, he would only watch it with me legit. Ofc with his friends too but alone with me wow. ( online movies and where you connect on a call). He is also not the type to reply fast, but now he replies. He asks for advice on what to wear, he also said he would only wear the one which I would pick. He asks me when I am free and keeps making movie plans with me. We recently went to one of our friend's bday party and he was avoiding talking to me at times. The thing here is a year ago, his friends also pranked and told me that he liked me, but after 2-3 months I got to know it was just prank, I actually ended up liking him though but anhways. Also, it was the last day of school, we had this shirt signing thingy and he wrote " wasup nezuko, guess what I am zenitsu" and then he later texted me if I read it or not, and also said " because you are the nezuko chan to my zenitsu" I shrugged it off because I thought it was a prank but it wasn't I guess. I just need a third opinion on this
I am having doubts, I don't know but I think my guy friend might be into me, I am not so sure so please can you give me your opinions?
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