How Can I Make Sure I dont Lose Him!

ok so i really like this guy and he likes me. We had this crush for like 6 months and then we started going out about 3 weeks before school got out. I ended things bec/ i didnt think we could last thro the summer but we still talked and everything but i was always mean when he called cuz it made me want to see him. Well i really dont want to lose him wut can i do im in love with him and i wouldnt no wut to do without him.