Need help navigating romance and strict parents

I’ve (20F) been seeing a guy (24M) for a year now, mostly long distance (USA-Greece) I wanted to be with him this summer but not without planning something productive on the side, so I got myself a research internship at a prestigious University in his country and used that as the main purpose of my summer trip when I told my parents my plans.

Because we are long distance, myself and the guy are not sure what will happen after the summer. We are very emotionally attached to each other, but I don’t think we can maintain things after the summer, and I’ve expressed this to him. Still, he opened up his apartment to me for the entire summer for free.

When my parents asked where I was staying, I told them that I paid a small fee of $2000 to live in one of the city centers for 2 months m. A situation like the one I presented is extremely lucky and rare, because the area that I’m in is expensive. Last summer, I did get an apartment for free from a couple who was honeymooning, but to get this lucky again seems a bit far fetched.

I told my parents that the guy who owns the place is vacationing in another country and that I’m staying alone. My dad is actually coming to Greece next month for a short period of time, and joked that maybe he could stay with me (it’s a one bedroom with one bed, and I showed him that). The reason why I haven’t told my parents, is because I’ve never introduced any man to them, they’re very protective of me, and I’ve never spoken to them about my romantic life. I don’t want their judgment or input on my relationship with this man and I don’t want them to make it into a bigger deal than it is. At the same time I feel really uncomfortable with the feeling that I’m disrespecting the man I’m with, disrespecting his parents who really like me and lastly disrespecting my own parents. I have expressed my feelings and emotions to the man that I’m with, and he understands me. But I’m not sure what to do, and I’m really not keen on telling them. I would appreciate any advice, and please be gentle because this is not easy for me.

edit:

I have traveled to this place solo 4X before, my parents have a lot of connections here and I have lots of friends so safety isn’t a worry and I did come with enough money in case anything were to happen