Love is work . Love takes effort. If people don't want to put in the effort then they don't truly want to be in relationship with you. Relationships are give and take and it needs to be an even distribution. Problems start to happen when it is uneven, people feel used and tired.
Speaking with mom yesterday talking about finding a life partner , we big realize that it's a big decision. You can be with anybody but not everyone is a good fit.
To walk a part together you have to be going the same way and be on the same page. In starting to realize some people are in a different chapter or a different book or on a different path . Thus to continue on my path I must leave them.
Getting older and knowing more what you don't want gets you that much closer to what you do want!