If you're feeling persistently depressed and it's impacting your life, it might be beneficial to speak with a mental health professional. They can provide you with the support, resources, and strategies to navigate through these feelings.
That said, here are some general suggestions:
Self-love and self-esteem: Start by focusing on building your self-esteem and sense of self-worth independent of anyone else. You are more than enough on your own and it's important to know and believe this. Try to engage in activities that you enjoy and that make you feel good about yourself.
Healthy relationships: Remember that healthy relationships should complement your life, not complete it. Your happiness should not be contingent upon someone else's presence or attention.
Patience: It's normal to desire a romantic relationship, but it's also important to remember that these things often take time. It's better to be patient and wait for a healthy and fulfilling relationship than to rush into something that's not right for you.
Professional help: Consider seeking professional help. Speaking to a therapist or counselor can be incredibly beneficial. They can provide a safe space to express your feelings and can help you navigate through this.
Support network: Reach out to your support network, be it friends or family. Sharing your thoughts and feelings with them might help lighten your burden and they could also provide some helpful advice.
Remember, it's okay to seek help and take care of your mental health. You're not alone and there are people and resources out there who are ready to help.