Most Helpful Girl
You appear to be mature and with this, very smart and know how you feel and what you want and it Isn't------I don't think I want to start dating again.
Put this to bed so you can rest easy. You do need to set the record straight with the guy here, dear, who 'I can tell he is very interested' or this will go on and could end up down a beaten problem for him when he does finally learn, even after a 'Second date' that you would make, that he just got burned.
You say he 'Texts me quite frequently' so perhaps by you initiating replies to this guy all the time, it is leading him on to most likely head him in the direction of asking you out for probably more this time than coffee... perhaps a table for two.
Text him and tell him you are going to be pretty busy the next month or so and you aren't going to have time for a lot. Tell him you appreciate his Friendship (Emphasize this) and you had a nice time over the coffee but right now, dating isn't something you are going to have a lot of time for and it's nice to be friends, thank you.
If you do happen to bump into him, it may be awkward but he will get the hint that he is not your cup of tea.
However, for it has happened to me a few times in my life, that with giving someone a second chance in going out with them or even having it suddenly hit me that we did have this 'Connection,' it ended up a surprise to my own eyes.
Good luck. xx