Losing my Virginity

SOS SOS I need help. He’s my guy friend and all we’ve done is cuddle and make out a few times. The other night it got really heated (my shirt was off jeans were pulled halfway down and he had his shorts off). Today he asked if I wanted to hang out tomorrow to get out of my house for a bit (I have toxic parents and hate being home sometimes) and I said yes. He said “we can finish what we started”. Now I need advice. What do I wear? What do I do? How do I make my mother believe that all we did was watch movies? What do I do after we’re done? I really need help and answers because I don’t know what to do and I can’t ask my sisters cause they’ll tell my mother. Please help 🥺