I'll try and keep this as short as I can without leaving out important details.
I split up with my DP Back in October. We have been back together since mid February and things are going well however when we split it was not amicable and we didn't speak at all apart from things to do with our DS. I honestly didn't think for a second we would get back together but thats the way things have turned out and I'm very happy. However we did keep it quite for the first while and have only really recently started telling people that we are together again.
I have been Friends with a man (Lets call him A) Since before I met DP (Known A nearly 7 years, DP nearly 6 years) Met A through a part time Job when we were teenagers and we clicked instantly and became very good friends. I must admit I fancied him but he had a girlfriend so nothing happened until about a month or two before I met DP when he had broken up with his girlfriend on a works do we kissed but thats was as far as it went. We remained friends and I met DP. Found out then that A and DP are first cousins but they do not speak as there parents has a falling out when they were younger. Honestly did not know they even knew each other let alone were related when I met DP. Flash forward about a year and I fell pregnant with DS. A has also got back with his Girlfriend and she was also pregnant just a month between us. So his DS and my DS are 3rd cousins IYSWIM.
Always remained friends with A although sometimes we could go quite a while without talking but when we did talk it would be like always. He is quite a natural flirt but I know what he's like so don't take much notice. DP has always been a little jealous over A because he knows I used to fancy him and we have a close friendship but I have always been completely honest.
That brings us to the few months DP and I were not together. I grew closer to A in the way that I would talk to him most days. Met him a few times just as friends honestly the only time anything happened was the kiss we had as teenagers. He was a massive support to me when I was going through a tough time and I could't be more grateful but I started to develop feelings for him of more then friendship. I don;t know if it was a rebound thing or not TBH. He has long since split with the mother of his DS and had had a few relationships since. The latest has just broken down so he was in the same situation as me feeling low and a bit hopeless. Our conversations turned more flirty but it was mutual and we both knew what was happening. Just as I thought something might happen as in we might go on a date or something he back tracks and says he doesn't want to hurt me and that he might be getting back with his ex.
I was glad he had been honest and we took a step back and went back to being just friends. about a month after this DP started talking about talking through our problems and giving things another go. Everything was fine up until a few weeks ago when A suddenly tells me he has fallen in love with me and how do I feel about him.Bear in mind he has gotten back with current girlfriend as as far as I can see had no intention of breaking up with her. I told him I was flattered and that I thought there would always be something between us but he was in a relationship and it was looking as if i would be to. He didn't take this well and up until tonight was not talking to me. Out of the blue he messages me just random chit chat when all of sudden made quite an inappropriate comment quite out of character. He has always been flirty but never disrespectful.
I told him I thought it was an odd thing to say and he responded that I wouldn't have minded a month ago if he said it to me. I explained that yes I would have as he was still in a relationship then and so was I. He said that he would just go back to not talking to me then and thats what he's doing now.
So sorry for the long post. Should I just accept this friendship is not healthy? I feel like this is all my fault and that I am a bad person and have hurt him. Please any help or advice would be great.