The quality of the portrait is that of the one in the link below.
http://orig13.deviantart.net/de65/f/2016/099/3/6/a_pretty_person_by_soapypnutwaffle-d9ybuix.jpg
PLEASE. If you were a guy, and a girl you only know a little gave you a portrait she drew of you, how would react?
I would be flattered and thank her as well as compliment her skills. Then ask if she thinks about me a little too much or if she just got bored and draws everyone she knows or meets
Will Desel gave an excellent answer.
That is exactly the way he should react.
If he doesn't make that comment and ask that question, somehow make it for him and answer the question as well.
Some of us guys are somewhat dense and shy.