Help

Help please

Currently I'm with a man that I've been with the past 2 years now and I really like women too which means I'm bisexual , but I don't think he would see it that way if I was to tell him , when I look at him some part of me loves him like mad but some part of me loves a woman 🥺 we have a child together (I have 2 children) and I feel like it would break his heart ..... What do I do should I just break up with him and not tell him or should I just tell him .... I'm scared of the outcome 🥺 but I guess I have to do what's right .....

My sister recently come out as bisexual this year and she thinks I'm just trying to copy her which is why I'm afraid to come out to anyone because she accused me of trying to steal her life and be like her but I've kept it inside of me since 2016 and I'm scared please someone help