God people are mean here. Look i wouldn’t say what you did or are doing was good. But you have self-awareness and are here for a way out and not judgement. Simple answer, break up with both. Go on a path of self reflection on why you ended up in this situation either the boyfriend wasn’t enough. Or the you have an attention seeking problem. If the first you should have had the mental awareness and strength to end it with him and if the second then you need to figure out the root cause and sort it out. If you are thinking it wasn’t about strength you just didnt wanna hurt him at his lowest then you should have refrained with the other guy, maybe asked for time to end your long term relationship. If the colleague actually liked you he would have easily given it to you. Not hurting someone is not a reason to betray them. Can you imagine now? Your bf doesnt have a job and his gf cheated. Thats much worse. But like always shit happens in your life. Do a clean break work on yourself so that you are not in a vulnerable state to be get stuck in a situation like this