I felt like that along time. I no longer feel that way because your spirit knows what's best for you. Sometimes you collect so much of other people's energies. Especially your partner.
If you are like me, a taker, you will be attracted to broken or souls who need healing. Even if they are not consciously giving you their energy, they do, as much as you are not realizing you are taking. (if I'm confusing you, excuse me).
Some of us take lower or broken energy and convert it to higher energies.
I've had relationships where my spirit tried to heal the other person, and that person's energy either rejected me (by causing silly arguments all the time) or take gave too much (which made me drained or sick). Eventually the universe takes them from your existence to protect you. Although It leaves you with an void in your system, know they the universe knows whats best.
Some of us also have bouts of loneliness, whether you are with someone or not.
Take that time to spend some time loving yourself. We collect so much energy all day that we don't think about our own healing. Sometimes we don't even know which energy is really ours. Embrace this time alone. you can't love someone or heal someone who is drawn to you if you you don't love yourself. You will always feel broken unless you spend time to love yourself. Your times of being alone (never consider it as loneliness) is a gift you are given to do the things you truly want to do.
When I realized my loneliness was really the gift of being alone it allowed me time to revamp and to encourage positive things into my life and It healed me for my next charge (what I call a broken spirit with needs me)
What I also realized is that some people are not allowed to stay in your life for long. Some people are there for a quick fix of healing and then we as Empaths fall in love and try to keep them longer than they need to. We feel so awesome when we make someone feels better and we grab on to that feeling and fall so quickly. When that person has enough and moves on (like they are supposed to) we feel like something is ripped from us. We feel a hole, like a part of us is missing, we feel like there's no more will for living. Once you are confident and aware of this, wish them well. Some come back into your life and will be the best friends you ever had. Some won't. You have so many other people who love you and so many other charges to attend to. Its ok.
I'm telling you, once you embrace and become aware of how awesome your gift is and how important this time alone to relove yourself you will no longer have that feeling. You may even get to love yourself so much that you will realize you don't need someone to validate your awesomeness. It will make thing a whole lot easier.