Does he really like me ? ( it’s very long sorry )

okay for this story it contains 3 main people. Me, my now boyfriend ( M ) and his friend ( J ). M and i have liked each other for some time but i am 15 while he is 17. i see no problem with that tbh. anyways on the last day of school J asked to take me home and i said okay because it was better than riding a hot smelly bus. M came with us which i expected because M & J are great friends. At this time M and I did go out yet ( we started dating the very next day ). We were all in the car. M and I were sitting on the back row while J was driving. We weren’t doing anything but talking and listening to music like we always do when he brings me home. i had a red band on my hand and M wanted it and i refused to give to him so we were play fighting for it and during this he kissed me ( that was our first kiss ). We started to make out and eventually i was laying on my back and he was on top of me while we were kissing. He moved his hand down to finger me and i moved his hand away and he kissed me a little more then put his hand back down there. This time for some reason i didn’t push his hand away. It’s as if i felt comfortable around him. he started to finger me and kiss me at the time and i didn’t even think twice about it because it was like we were in our own little world. while this is going on his friend , J is just driving and i guess ignoring us. M and i continue to do what we are doing not really caring about his friend. like 5 minutes later i feel the car stop and he parked us out by a football field, his friend got us out the car and left us by ourselves. i personally wasn’t ready to have sex but with him i felt like i was safe and i trust him a lot i didn’t feel like i had to do it i did it because i wanted to. anyways he stopped fingering me and pulled away from my lips. he tugged at my pants to pull them down and i allowed him to. he started to give me head and it felt amazing. He gave me head for about 10 minutes. after this he pulls away and started kissing me again he grabbed my hand and put it at his pants and I pulled them down and started stroking him. he tried to put it in me but i stopped him to say i’m a virgin so go slow and he said me too and so i pulled him back to me and  we continued. he put it in but not all the way and i thought it would hurt really really bad but it didn’t hurt at all i don’t know if it’s because i was so relaxed or what. so we clean up and everything and his friend comes back like 5 minutes later and he takes us to eat and then they drop me home. That day but at about 2 in the morning he told me he was outside and that i should come out so i did and he said “ look ____ i’ve been asking you over and over and you won’t give me a straight answer and i really like you and i want you to be my girlfriend “ and ofc i said yes but i feel like the only reason he really wanted to be with me is because of what we did. i know he likes me but the same reason i didn’t date him before is the same reason i’m iffy about dating him now. i really think he just likes me he doesn’t want to build with me especially considering he’s graduating the upcoming school year. Ever since we started dating it’s been amazing we gotten closer we stay up just learning new things about each other but sometimes it just feels so unreal.