Is it love? Or is it done?

I am 16 years old. I met my on and off boyfriend/first love at 14. He was 17. Now he is about to turn 19. I was a freshmen and he was a senior. Everywhere you seen him, you seen me. He was the love of my life We were so happy. We told each other everything. We trusted each other. Nobody could break us apart. Everybody knew I was his and he was mine. Typical favorite high school couple. When he graduated he went into the military. I waited for him in basic training to get his phone back. It was the worse 13 weeks of my life. I waited and cried and cried. I spent my whole summer at home. School started and dudes would want me and I would curve them. I was loyal. I still texted his phone every single day. Like a diary entry. The way he made me feel. So important. So secured. So loved. I got pregnant while he was gone. Remind you my birthday is June 17 so now im 15. Pregnant by an about to be 18 year old that is three states away. I was so upset. I wanted to keep it. I wanted apart of him here with me. But i ended up losing the baby. I didn’t tell him. So when he finally got his phone back and the basic training was over. I was so happy. He was too. Everything was fine for the next two months. We began arguing. About dumb stuff. Its usually I want to do something and he sees its a bad idea. But since I think I know everything I don’t listen. But he ends up being right everytime. So on and off over and over. Now its been a year and four months and we keep arguing. Its like a cycle. We realize we love each other. We get back together. Argue over something totally dumb. Give up and break up again. It is so annoying. He does do things for me that not even my own dad does. If I need money he sends it. If I dont have something he tries his best to get it for me. I told him about the baby about 3 weeks ago. He was so upset that i didn’t tell him. I felt so bad because he deserved to know. He is such an amazing person. I realize that sometimes I don’t appreciate him. Sometimes I forget to give him my full undivided attention. He is my whole heart. I always think about a future with him. I do want to be with him. He is my first true love. I have never felt this strong to do on and off long distance. Yes when we were off I would text dudes. But to entertain. Not to actually be with. Because unless they are better than him I dont want them. But it isn’t possible to be better than him. I just don’t know what to do. I hate that we argue. It makes me have anxiety attacks. Any advice would be great. I just dont know what to do anymore.