I really feel like there’s no place for me in my partner’s life. They live so far away and have so many lovely (and not so lovely) people around them that I don’t see where I belong. I don’t think they really take our relationship serious at all and they just seem to have everything they need. I love them so much but I don’t think it’s meant to be. They have so many partners already they can barely manage. I don’t know what to do.
Have you talked to your partner about this? It’s okay to ask them to set aside to talk, then say something like, “I feel like you don’t take our relationship seriously,” or “I feel like you don’t value my contributions to your life.”
Remember that the issue is how you feel, and their actions - not their feelings. If they say “well, you’re wrong, I do value you,” then you need to shift the conversation to “here’s what I need from you to help me feel that, here’s how you can demonstrate that for me.”
It really helps to go in with some specific requests: asking them to spend more time with you one-on-one, or make more time to call or email you, or not to spend so much of your time together talking about their other partners, etc. People can’t magically change your feelings, but they can change behavior on their part that you feel bad about.
If, when you tell your partner how you feel, they argue, withdraw, or refuse to make any concessions to help you feel better, it might be time to end this partnership. You deserve to be in a relationship where you feel valued and welcomed in your partner’s life - if someone makes you feel like you’re not worth their time, that’s unacceptable and you have the right to walk away. (I actually just ended a 6 year relationship over this exact issue. It hurt like hell, but it was the right choice. I did what I needed to do to protect myself. You can do it.)