7 months is still pretty young, some babies still need their night feeds
Try not to compare yourself and the amount of sleep you get with other parents as that can add more unnecessary pressure on you if you and baby are not ready to wean of night feeds. Every baby is different and every baby's sleep changes over time. They can sleep through the night for many weeks, and then wake up every 3 hourly for the following weeks...especially when they are achieving milestones this can also affect their sleep.
Also, night wakings actually protect young babies from SIDS, so it is a good thing that they wake up frequently even though it is exhausting for us breastfeeding mothers.
They will get there eventually, and it is only for a very small part of their lives. If you are able to, persevere...we're here persevering with you