Are we falling for each other AGAIN!?

I was in a 5 year relationship with a guy and it ended pretty badly because he knocked up another women while we were together. Anyways we recently came into contact again and we kind of turned into friends with benifits (we are both single) and that was okay with me I mean it's just sex and I mean why not? Everytime we'd meet up we'd just talk for a bit about our days or what's going on and then hook up and that's it, now lately we go out to dinner, run errands together etc then go back to his house watch movies and videos joke around hook up then just keep hanging out afterwords and last night we went to our favorite ice cream parlor then just went home watched movies cuddled and fell asleep together with out doing anything and idk about him but lately I feel nervous around him kinda how I felt at the BEGINING of our relationship. And he's been acting extremely nice and kind of how he was throughout our relationship towards me. I don't know if it's just me or both of us that are catching feelings again. Opinions?