Fallen out of love 😢

I’ve been with my fiancé for almost 5 years and we have a 6 month old baby together. Lately I’ve been feeling like I’m not happy with him anymore but I’m been extra stressed at work and he’s being more annoying than usual so I put it down to that. Now the stupid Coronavirus has hit he is at high risk so has been ordered to stay in for 12 weeks. My job have given mr the time off too as we have a child together we physically have to be together at some points and I could well pass something to her who could pass something to him. So we are on day one. All I feel is dread that I have to spend 12 weeks locked away in a house with someone I’m no longer in love with. There’s nothing there for me at all. I love him and I always will but I’m not in love. I can’t leave because he will try and keep my daughter from me as he’s very worried about her being in contact with anyone due to Covid 19. I feel lost I don’t know what to do anymore.