I’v just seperated from my partner of 15 years so I’m a bit out of the game. Iv recently joined the gym and for the past 3 weeks there is this guy who gives me eye contact for more than 3 secs and smiles as we walk past each other . I smile back then look away. Could he be interested in me or am I being a silly school girl and getting an ego boost lol? He usually keeps himself to himself in the gym and focuses on his workouts.