How do you know when a guy holds your hand romantically?

im 22 never had a boyfriend or fwb just recently the guy that i like held my hand i was really jervouse and exicted btw he is 30 so let me know im new at this also if he held my hand does that means he likes me more that a friend? i know my love life is pathetic also the next time he holds my hands i know i hold his back but what else should i do? btw we are not dating or anything i think that there is some attraction with each other because we would majorly flirt with each other more now than b4