Do I like him like a boyfriend?

His name is matt and he was my best guy friend and he liked me for two years. I never knew. He told me this last febuary, I was shocked. I told him I liked him too but I didnt. I told him that because he caught me off guard and I couldnt make up my mind that seccond but I could tell he wanted an anwser so I just told him I liked him too. Once I thought about it I knew I shouldnt have lied to him. As time went on I started to like him but it felt like I was just learning to…he then asked me out…it was a single date it was a group date…but I said yes…dont ask me why I said yes because I dont even know…then he starts to call me his girlfriend and then one his friends was mentioned us being girlfriend and boyfriend. This wasnt the first time I had heard of him calling me his girlfriend, my good friends told me that he talks about me being his girlfriend and once agian I was shocked…and now he tells me im his girlfriend and then he asked me if his my boyfriend and I say yes..I know im stupid I let it wayyy too farr. But now I dont know what to do…I know that if I told him that I never liked him he would be heart broken…my best friend was going out with his best friend and she just broke up with him so I dont want him to think that it is because of my best friend or anything liek that. And I want him to be my friend. So what should I do?? He is hott and nice and smart…I do like him but I just dont if is a boyfriend kinda like???