<human>: Condense the text into a few key points

I'm F[24] he is M[30]. So I start school today. and my bf who has bad history and is insecure is worried about me meeting guys. why because 4 years ago, when we were friends one male classmate who i had exchanged #s with as part of the class instructions once texted me wanting to go out and i simply ignored it. one week later he walked me to my now current boyfriends car. 

Two semesters ago i had a group project with two girls one guy[gay guy def not on his radar] no texts were out of line. not all regarded to class nor ever personal. 

seriously this is all he has to on me with school and guys. i don't really make friends in my classes. not the most sociable person. he doesn't trust me and thinks this mentality of mine that thinking nothing is wrong with what i did 4 years ago is cheap and dumb. because i did not immediately correct the guy for sending those text. for letting him walk me to my car. keep in mind. campus night classes, and my thought is he walks me to a guys car he will see i am not available. and well he didn't contact me after that and that worked. and my bf now says that was dumb for me to think, that i should of said no when asked to be walked, i was single then, uninterested, didn't wanna be rude. didn't think it was so out of line. BF says otherwise and that I'm part of the problem when i didn't reject right away. does anyone think that? or do people act like me and just don't respond to advance but don't immediately shut down. if anyone gets excessive I'd say that's necessary. now bf is being distant when nothing has even been done. so confused and frustrated.
<bot>: BF says i'm cheap because i didn't shut down the advance of a class mate 4 years ago. i just ignored it. i don't see any wrong in my actions.