Help?? Advice; divorce ; life

Sooooo long story short my parents were married about 20 years about... and my dad was always having affairs since I was about 10 I'm not 28m. Parents finally divorced when I was about 13 or 14... years passed mom and dad both have been in relations ships, mom is single now and well dad is married now... well my dad finally ask for forgiveness from my mom couple weeks ago and states that he wants his family back, the marriage he is in he is not happy, and he fell back in love with my mom, my mom states that's she has feelings for him as well over time they became real close friends and my dad started confiding in her more... I really dont know how to feel about this... it makes me sad but it makes me happy... but more the sad part bc it's like having this thought of having my family together and a huge chance that It wont happen and maybe shouldnt...