I am so confused

I am 16 I have known this guy for quite some months. I first met him in lunch he made this dumb remark and I didn't give him one inch of my attention by time we were about to switch classes we start talking. He is a senior going to college this fall and I am going to be a junior. We moved fast only talking 3 days and jumping into a relationship and soon it ended just of 2 weeks. It's been alsmot 2 months and we barely talked maybe few texts. And today I send a text saying hey how are you. He tells me and says you text me put of know where what's wrong. And I tell him how I feel and we talk a bit over text and we are back together. I don't know how to feel I am more than happy but still feel some type of way about it.