Witr is not a must like (obligatory) prayer, but it is Sunnah, so do not omit it. Shuʿbah said: I found it written with me: And the Messenger of Allah ﷺ prayed Witr.
لَيْسَ الْوَتْرُ بِحَتْمٍ كَالصَّلَاةِ وَلَكِنَّهُ سُنَّةٌ فَلَا تَدَعُوهُ قَالَ شُعْبَةُ وَوَجَدْتُهُ مَكْتُوبًا عِنْدِي وَقَدْ أَوْتَرَ رَسُولُ اللهِ ﷺ