You should be able to judge that perfectly yourself provided you know the difference between love and lust. I will try as much as possible to make my answer brief and explicit to enable you to understand my point of view as regards to your question.
I define lust as being attracted to someone due to what they have in terms of materialistic possessions or body mostly for the main purpose of fulfilling one's sexual desire. This simply means that lust is sometimes about having sex with someone due to his or her body or what he or she has in terms of wealth knowledge, etc for some specific period of time without the intention of marrying or dating such person. Most ladies or guys do get heartbroken as a result of being deceived by someone who claim to love them not knowing it was just to have sex with them (lust). When someone is in lust with you, he or she just wants to have sex with you and leave or abandon you without marrying you.
Love is all about sacrifice and loving your partner for whom they are and not what they have because when they loose what they have such as wealth, fame, beauty handsomeness, etc will you still love them as you claimed to say? If your answer is yes, then that's love and if your answer is no, then that's lust. Love is the act of spending the rest of your life with someone you are in love with and accepting their mistakes and shortcoming. Love is beauty and your life becomes more beautiful when you and your partner are both in love with each other. Love in essence is just loving your partner the way you love yourself and making things happen for your partner the way you want it to happen to you.
I guess I have given you an insight about what love and lust is about and I hope you will be able to identify which one happens on your date.
Thanks for reading and I hope this helps.
Your interest with the person... do you see you guys just having sex or you you guys interacting in a long while? what are the things you quickly noticed? is it more of the physical features or character and reasoning ? how well are you moved to know more about the person?
Unfortunately some people fail to realize it on time,when you realize it's only sexual attraction that is keeping you both and the relationship has nothing else to offer then I consider it lust.