I am torn between spending time with my family members and spending time with my boyfriend (fiancé)?

He wants me to move in and spend a lot of time with him. I love doing that too. However I feel I need to spend time with my parents. I talked with him and he very much agrees with it. However my sister who has a 2 year old always wants me to baby sit along with both my parents. I can sense that he is now becoming impatient with my sister. What should I do?
I am torn between spending time with my family members and spending time with my boyfriend (fiancé)?
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