<human>: Can you succinctly summarize the text in 1-3 sentences?

So, this is something I have been afraid to deal with when it came to a new relationship.  My last boyfriend and I had an amazing time together, but we both ultimately realized we were better off as friends than being together.  I don't have any romantic feelings for him anymore, but I do love him as a friend.  He is incredibly supportive and we gel really well.  I have, in the past, tried to approach the topic with a romantic interest only to have them get  very judgmental about it.  I recently met a new guy who I talk to every day, we've been on dates, and we have both expressed a desire to try this out.  I also really don't want to cut off my ex-boyfriend as a friend because he has helped me through a lot and, although we dated, I think of him more as a friend.

To cut to the point, I have not been able to successfully broach the subject with a couple romantic interests in the past and I really like this new guy. He is everything I had hoped for, but I feel like he is going to judge me/feel intimidated by the fact that one of my best friends also happens to be an ex. How can I try bringing it  up in a way that won't make the new romantic interest comfortable with this?  I really don't want to scare him off.
<bot>: My ex-boyfriend has become one of my best friends.  How do I bring this up in a way that won't scare off my new romantic interest?