confused

so i have an ex (he was my first love) we're in the same jhs but he is 1 year older than me so when he graduated he moved to another city. we've been lost contact for months but currently he said he saw me and ask for meet up. i cant describe my feelings but ofc im so fckin happy but also mad at the same time cs u know wht? i know he still have girlfriend in the same city as him but he ask me to meet up? he probably know i still have feelings for him but i feel like it's wrong even though i actually said yes and he keep asking for meet up 3 times and 3 days in a row. and yeah he came back to his city in the day 4 and you know what in that day he post his girlfriend while im in here thinking we could back together bcs of his act like he wants me back. i feel like a fool but i cant deny i still want him and now i decide to delete his contact. what should i do?