Ex wants me to pick our son up from school on his week

I have two kids. They both have different dads. My 13 year old is on his week with his dad. My ex asked me to pick our son up from school early because the guidance counselor called him and thinks he should maybe go home because he's really upset. During lunch he told one of his friends he thinks he may like boys. The friend went around band class saying he's gay and he got mad and started crying and pushed him. His friend said he was only joking around with him. My son's dad wants me to get him because he said he's not good with this type of thing and thinks I would be better. How? He's our oldest. I haven't dealt with this teenage stuff yet. I'm learning at the same time he is 🫤