Dating

Should I change something?

Known my brothers friend for years and I feel there’s always been that flirtation thing going on between us. I remember when I had a boyfriend ( his now my ex ) and he got pretty jealous and didn’t like him. After that my brothers friend got his first girlfriend and I was like ah I’m happy for him but I was kinda jealous at the same time too. I don’t actually see him much anymore so when I do it’s always good laughs and flirting. My brother invited him to a family getaway thing and I was there. His still with his girlfriend but I don’t know it just seemed he wasn’t all that into her anymore as he was mega flirtatious with me like grabbing my waist etc and the next I knew we was kissing and telling each other we really fancied each other. But I was like crap we shouldn’t be doing this if my brother finds out or your girlfriend they both will kick off. He said my brother probably knows it’s going to happen & that one day he’d sort the girlfriend situation out & he feels he has to do some growing up. The next day of the getaway he was flirtations again and he gave me a hug, kissed me then said he does like me but doesn’t want to lead me on. I said I understand I just hope this doesn’t now get awkward where we avoid each other as you are apart of the family he said it won’t. We don't text, meet up or have sex ( even though I would love that but obviously we can’t ) He did send me a friend request on Instagram but I declined it as I didn’t want to see pictures of them together or he view what I’m up to it just seemed disrespectful. Iv had him on tiktok for ages so I just kept him on there as it’s just silly videos we both post.
He then visited for dinner a few weeks later which was fine nothing happened but a little flirting did happen. I don’t know if I should carry on with what I’m doing? Or change something? I also really don’t know if he just thinks I’m hot and wants to have sex with me not actually anything more on a deeper level.
Should I change something?
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