ex-almost relationship

a few months ago, theres a guy who was my college friends. we were so close & we have a lot in common. then the things between us got really intense like we talk 24/7 for almost 4 months. then, we got a weekend vacation with the whole class... so in the car he sat next to me on the backseat, and theres just the two of us on the backseat. suddenly he hold my hand & it was cold so i hugged him & he kissed me.. at first i dont want to but he tried & tried again till i want. then we kissed. after the whole weekend vacation. things between us got more intense & suddenly he just left me without an explanation. we still be friends till now & i never ask him why he left me but i think i still have a feelings for him🤔