Man with two kids and a girl still chasing me

Hey im 17 and theres this guys hes 23,we both have stong feelings for each other,i first met him about 8 months ago at work,it was diffrent then i hated him with passion,now i have fallen for him charming personbality in a big way,he says hes in love with me and keeps chasing me 4 a date,this guy is so persisitant,Its got to a stage whee he wants me to start a realationdship with him,from what he tellls me himself and his gfirlfreind are and have been having problems fora long time,i hate feeling like this i miss this guy,yet now i am trying to deny my feelings he thinks im breaking his heart bu playing around with him,im a happy go lucky friendly person alot of the time,i cannot ignore him and seeem him every weekend,its so frustrastiong because the chemistry beetweeen us is so stong,we make eacjh other hasppy yetwhen im with him i always wseem to forgwet about his attachments i know its not right for me 2 feell this way but you cant help whjo you falll in love with,i feel so guily, weve kissed at work alot and been very flirtasious to a stage where people are talikng and assumiong that we are an item,what should i do Tweet