Tf i do?

So long story short iam 17F and my cousin 17M we our families are together since our childhood coz we live in a same place hes my khalas son and we live in a same neighborhood we were best friends and he confessed that he likes me in 8th class but i said no cos i dont like him that way and now iam in 12th grade still our families bond is so strong i like them also soo much but now he started doing creepy things like he told my younger brother that he still likes me and going to marry me he didnt know that my brother told me cos he thinks our bond is not that strong we always fight we do but share our secrets too so then he told another cousin whos 22 years old she also live there now shes saying me that why are you not getting in a relationship with him hes so handsome and likes you alot (ik that hes handsome he really is hess sooo much tall maybe 6,1 hes tallest in our family and has a good personality) but i dont like him ik he wants me to be his main chick and other girls to be side chicks he also semt request ro my best friend who he knows and my friend also knows cos my friend live right infront of his home ( we all live in a airforce base actually so we all know eachother) and my mother also like him and his family sooo kuch he also has brother who is 19 he proposed me too (which was totally unexpected i hated him from the start) my mother wants me to marry his big brother and he also sent rishta which i said no and my father said okay ( thank god i have a loving father) otherwise my mother was upset but she didnt forced me but that younger cousin started messaging me( on insta) his 3 ids were added with me on insta and he started replayin on my stories complementing me i said to him dont do this otherwise i will blick him and he didnt stop and i did blocked him amd unfollowed his every id he has my number ofc hes my khalas son and my mother or they call me from his number 10 times a day he started messaging me on WhatsApp and i said if he didnt stop i will blick him there and he stopped but sometimes he messgaes me and then delete it i dont even look at him face to face and even he himself is very shy wen infront of me ik hes a big mfs he sent requests to every girl he kept saying things to my brother and that girl cousins and yk what her sisters who are like my bestfriends were furious on me wen i rejected their brothers proposal and said then who am i going to marry like tf iam only 17 they themselves are not engaged yet it was so hypocritical of them and they say thats okay now you are young wen you wil get older you will marry him like they are the only boys in world they even check my phone if i talk to some guy like my parents dont even check my phone and they always keep me in their eyes if iam doing something suspecious i cant tell my parents about that younger cousin cause cause i told my mother about his big brother and she said that tell him you dont want to talk to him but if a say about the younger one she will say that why they are coming after you Gang pls tell me what should i do specially about younger one he has told every cousin half the family thinks we are in realationship even in viallage there are rumors that im engaged to uim what to doo immm soo depressed????