It's difficult to determine someone's exact feelings or intentions based solely on their response to a follow request on social media. There could be various reasons why your ex-best friend hasn't responded yet, and it may not necessarily be about resentment. Here are some possible explanations for the lack of response:
She might not have seen the request: People can miss notifications or overlook follow requests, especially if they are infrequent users of social media.
She may be taking time to consider: Your ex-best friend might be uncertain about whether to accept the request or not. She could be taking time to think about the implications of reconnecting with you.
She could be busy: Life can get busy, and she might not have had the chance to respond yet.
She may be maintaining distance: After a falling out or the end of a friendship, some people prefer to maintain distance and may not want to reestablish connections on social media.
She might not be interested in rekindling the friendship: It's possible that your ex-best friend has moved on and isn't interested in reconnecting.
If you genuinely want to understand her perspective or attempt to rekindle the friendship, consider reaching out to her through a private message or in person (if possible). Be respectful and understanding of her feelings, and don't push for a response if she doesn't seem receptive.
However, it's also essential to acknowledge that friendships can change over time, and sometimes people move in different directions. If she doesn't respond or makes it clear that she's not interested in reconnecting, it's important to respect her boundaries and focus on building new connections with other people who share your interests and values.
Remember that healthy friendships are built on mutual respect and understanding, and sometimes it's best to let go and move forward with your life if a relationship is not meant to be. Focus on nurturing existing friendships and making new ones, and don't be too hard on yourself if things don't work out with your ex-best friend.