It's hard when yr mom starts seeing someone new as you always hope yr parents will get together again. But yr dad wasn't honest with yr mom and they broke up for reasons that matter to them. Now, yr mom needs& deserves to find happiness. It's not fair to expect her to spend her life alone. She must also be worrying about her since you argue a lot. Give this man (Tony) a chance even if it doesn't feel comfy at first. If he's nice& he makes yr mom happy, things will improve for all of you. Maybe he can't take yr dad's place but maybe he can help make you feel better as yr dad's in a tough place now & needs time alone- which makes you feel lonely. Tell yr mom when you're both in a good mood how lonely and worried you are but that you love her and want her to be happy. If you live yr life and go out with friends and enjoy yr hobbies and give this new man a chance, yr life will get much better- even if it doesn't seem like it now. If you need to talk to someone, find a counselor at school or tell yr mom to find you one; they will listen and keep it confidential. It's also good to write how you're feeling in a journal. Be honest and nice with yr mom, so you can have a good relationship with her. Remember that just because she likes this new man, it doesn't mean she loves you any less. Her heart hurts because you're sad, so reach out to her today.