Is she flirting with me?

Thats not really all that much info ...If she is sitting really really close to you and is laughing and touching you then she is flirting with you ....

If she's like really really close to you then maybe . Now if she's laughing and kinda touching you . She's definitely flirting you with you .

Yeah that's not really enough info babe-
if she talks to you a lot that's a possible sign; also if she's ever, when sitting closely to you, had her hand touch you and not pulled it away, that's a sign too .

Possibly keep watching for other clues like her watching you and ect