I met him almost a year ago at work and we instantly clicked. He had a DP at the time so we only kept it friendly. A few months later they split and we went on a night out with a group of people. We finally admitted our feelings for each other and began dating. It was very intense. We both had a difficult week each in our family/personal life. He became a bit distant and I panicked so ended things and said let's be friends. He made things awkward by cutting all contact. We avoided each other and didn't speak for a good 3/4 months. I was heartbroken.
Recently in the last month things have begun going back to how they were before we dated. Flirty and enjoying chatting. He invited me to lunch with him this week and began messaging again. Where he admitted he was jealous that another guy had taken an interest with me.
Ive fallen head over heels for him but I'm worried and scared he doesn't feel the same and that he doesn't want anything serious. To him this could be harmless flirting but I want it to be more. What should i do?