I would like both girls and ESPECIALLY guys to answer pleasee?

Im 16 and on the shy side im a girl. Guys at school dont notice me at all. they dont talk to me they dont look at me. I guess thts alright. but on sunday i got a new outfit. it's cream colored leggings with pink flowers on them. they r cute. i wore those on monday with this pink shirt. it looked nice. but i look nice any other day. so anyways this kid in my class told me that he likes my outfit. and i said thank you. (i also have a small crush on him.) but then i have him in my class at the end of the day and he got real close to my face and whispered "i like your outfit" so i said thanks and laughed. my friend sits next to me and the kid (lets name him richie) sat in front of her. a few minutes into class he turned to her and said quietly "i like those flowers. man dont u like that outfit?" i pretended not to hear him. but ive never been givin that much attention. im wearing the outfit again on tuesday if he starts talking to me again about my outfit is there a certain thing i should say or do? pleaseee help meeeee. just give me some advice