
Need advice urgent
So there is a girl whom I have known for 3 years and I also like her. She doesn't like the idea of marriage, that every time there is discussion about marriage in her family she opposes it by saying she doesn't want to marry or she will simply reject the proposal to avoid marriage. Last month she got into a relationship with her colleague and both their family knows. Now I feel bad about confessing my feelings to her and now I'm frustrated when thinking about it. I had a thought of telling her that I had feelings for her. I don't want her to break up with him and join me. I just want to confess my feelings and I don't know if it's right or wrong? What should I do. I need advice please.

Do not pursue. Cut off the engagements with her. You do not have to confess and make this more complicated. Concentrate on your work. Try to create new meaningfull relationships which will keep you mentally healthy

She doesn't know I have feelings for her even if I cut contact with her she will connect with me

It's easy to say that I can hide feelings. But being in continuous engagement makes your weak heart to be stuck with her. Trust me, I've been there.
If she asks about your changed behaviour, then dismiss it and joke about her bf. Like she only is too busy now, etc. Then jokingly, give her hints. You should also ask if she is going to marry him. If she says no, that will make you feel good 😄

Their family knows so most probably they are going to marry

Be there for her. Don’t share your feelings right now. If you are lucky you may end up with her some day.

Confess - then disconnect. It's easier to recover.
Not confessing - then disconnect. Takes a lot of time to recover.
In both cases - disconnect.