I need advice :(

So, I've volunteered for a woman for almost 2 years now, and she has a 24/25 year old son. I'm 15. To volunteer I have to go to her house because she has a farm with animals that I help take care of and maintain the barn. The problem is that I think her son flirts with me. He's always really happy to see me, he hugs me hello and goodbye, and we always have really meaningful and deep conversations. I really like to talk to him and I never thought much about it but I was talking to my friends about it and they thought it was creepy. The more I think about it the more I realize that I think he IS flirting with me. What should I do? I don't want to stop volunteering there because it looks really good when I have to apply for college. I'm not super concerned that he'll try to do something but it still makes me nervous.