Cheating, leaving, ugh help. No judgment please. Sometimes we just need advice, not hurtful criticism.

So I am recently divorced, I have 2 young children, I have been dating my boyfriend for almost a year; however I just recently re connected with a man whom I was head over heels for for years. He's finally clean and getting his life back on track and wants to be with me. I want to be with him too but I do love my boyfriend. I don't want to keep sneaking and talking to him what should I do?