No more in love

Please I need advice... I’ve been dating this guy for over 3 years now and we have a beautiful daughter together. I’m no more connected to him emotionally and sexually. We live together and I don’t know how to tell him about my feelings. He is planning on getting married to me soon. I’m so confused. I just need to figure out my life rn... get my papers in school and make my daughter comfortable... please I need advice... I’m depressed