Lean into this (as you may be projecting these beliefs onto your twin):
What is bringing up the resentment? Where is the discomfort here for you? Do you feel it's a direct result of them not caring or wanting to be with you?
ie. it could be that you were told that in order for someone to prove they loved you they had to make a grand gesture, or that they would prove it to you in some way. where did you learn that from? does it actually prove anything?
What to do with it now?
Acknowledge it, release any ownership over that belief and establish your own beliefs about unconditional love. Being aware of where this pattern came from will help you to establish that you most likely took on someone else's version of the truth.
You were and are now worthy of the most beautiful love, as you are in this moment.
Trust that whatever your twin is learning, it's so that they don't repeat the same mistakes with you. And even more so that you are doing through this so that you can not repeat your patterns with them either.