What should i do with my relationship

Leticia • I love drawing. Have the best guy in my life to take care of me when i need. Shy and loyal. Love making new friends. Want to be a baby sitter and a guidance conseleror. I love helping people
Me and my boyfriend get in argument. But we argue over Lil thing. Wen it happen he has to say tho two words " its over" but wen I say sorry he want me back and I really love him he like the world to me I don't want to lose him for nun even if it over Lil things. I have been with him over a year and five months. What should I do?