A good friend of mine for 15 plus years and I have recently become a lot closer. We have always been friends but after me moving closer to him we have been spending a lot more time together. We have always had a little flirt but recently our messages have become quite flirtatious. I have started thinking about him in a different way and I don't know if I should do anything about it or just keep things as they are. We have never both been single at the same time until now. I don't want to ruin our friendship as he has been a great support to me over the years. Guess I'm just wondering if anyone else has been in this situation and what they done about it. I mean he might not even feel the same but I'm getting that vibe at times.