should i write my ex again

so at 17 i was together with that guy for nine months, it was never a toxic relationship, it was just missing communication and that we both didnt knew it better at that age. Im now 20 and more mature. And idk, im kinda missing him or the feeling of a realtionship maybe. We both did write to each other like every half year for a check in how we are both. But im kinda thinking about trying it again. And i think with communication it could work Out because he was a good human