Ex and bf on a team 😩

Hey u guys. So I'm 20. I've had 2 boyfriends. Serious relations. My first was in high school 15-18. Then I went to school on scholarship for soccer n met my ex. 18-20. We broke up a couple months ago. No cheating. We jus wasn't on the same page anymore. So since then I've been single since October. Now there's this guy in my business class n we got paired up. He's from Canada. Real cute n tan. Adorable accent. We been slick flirting like skating n playn soccer. Now school jus started n I had to ask.. U r really good in soccer.. U play? He says "yes. He jus transferred for the soccer team". I'm like oh shit!" My ex. We had practice. Girls on one side n boys on the other to practice. My ex comes up n ask me how everything going n then new guy comes up to get sum water. My ex looks like who are u. Very awkward. So I get to my dorm n there's a knock at my door.. It's new guy. (He texts before he came) he ask me bout my ex n the team was talking sayn was we gone get back n I told new guy no. My ex is all about sports than me. New guy tells me he like me n wants to date me.. I didn't give him a answer n he kissed me. Told me to think about it. I like this guy but it feel weird when I go to practice and see my ex and him there. New guy told me we didn't have to put a title on us yet so we been seeing each other at night til I'm ready to be his gf in public. So I said I wanna be his girl now and the next day at practice, he runs behinds kisses me during break. Everyone like awe but my ex. When practice resumes, I hear this fight. My ex hits my new bf in this nose. I run to the other side and is like "wth is wrong with u" and my ex is like "this is what u leave me for? Sum canada bacon??!" And rants off at me. My bf going in and sayn "yo loss is my gain" and I jus leave practice. Practice is so tense now. How do I handle this?Â