While you're evaluating boundaries, consider how your expectations mesh with those of your partner. Do your wants and needs still line up reasonably well? Does one of you want a primary relationship while the other only wants to get together twice a week? That situation isn't going to work for very long. Keeping relationships healthy and growing requires work, communication, and sometimes a good strong reality check. If what you need doesn't line up with what your partner needs, it might be time to reconsider the relationship as a whole. Maybe you need to simply evaluate if you are willing to realign some of your needs to meet theirs and vice versa. As long as you meet in the middle somewhere, and communicate often, you can make it work.
Something I personally struggle with while assessing the state of my relationships is remembering to look forward, not back. Yes, things that happened affect where I want my relationships to go, but once the new boundary is set, once a partner and I have learned from the experience and know what to expect, that event needs to stay in the past. I have a hard time with this because I am an over-analyzer. I need to figure out where I went wrong, or what I did that exacerbated the problem (even if it wasn't my fault to begin with). Learning to let go of past events is something I'm working on as a person; no one wants something that happened a year ago to come up suddenly in the middle of a heated argument just because it makes a good barb.
Everyone knows that relationships are hard work. Be open to change, be willing to meet someone halfway on the big issues. Be willing to concede the ones that don't really matter to you but are important to them. Ask questions, ensure that your partner is getting what they need from you (and at least some of what they want). Remember that relationships are about balance. As the Stones said, you can't always get what you want, but sometimes you get what you need.