Too late to inquire about summer pe analyst position at previous employer?

Hello,

I am currently a third year university student in Toronto. I recently interned (unpaid) at a small private equity firm during the fall of 2016 while going to school full time. The firm has a very tight knit culture, no real bureaucracy/red tape, and I was treated very well as an inexperienced intern. I was bought lunch by my boss a few times, in addition to receiving a parting gift at the end of my contract.

When I ended my contract in December 2016 (due to the fact I couldn't fit work times into my second semester schedule), I mentioned to my boss the possibility of doing a summer internship the following year, to which I received a positive response, something along the lines of "...yea sure we will be in contact as it gets closer to summer", and it was mentioned by him that it would be paid as well.

My question is this, Am I too late to re-engage with my boss, and seek out a potential position for this summer? And what method would most effectively accomplish that? Currently thinking about either asking to come by the office one day during the week while I'm in the area and bringing coffee for my former co-workers, and maybe stir up a bit of conversation, see how the firm is progressing, build into the question etc. Or I am also exploring the possibility of simply just exchanging a few e-mails with my boss and after asking how everything is going with the firm and such, just ask if their is any potential for a summer intern position this year?

Would love to hear what you guys think, insightful input is much appreciated!