Hi Rhys
Its normal in relationships to worry and experience jealousy… That said the anxiety and panic attacks are your ways of coping with uncertainty, worry and concern. From that perspective the attacks are not connected to your relationship.
The first task then is not to ‘fix’ your relationship but to find a better method of coping with uncertainty, worry and concern. These issues belong to you so be mindful if you start to project them onto your partner. For example, giving your power away by making your partner responsible for your feelings.
If you can try to find a way to create some space where you can ‘detach’ yourself from the experience of panic – as in not attach your sense of ‘I’ to the experience/emotions. (you are not your experiences or your emotions or your relationship…) Here you feel what you feel without becoming what you feel – a difference between ‘I feel sad’ and ‘I am sad’
By ‘detaching’ your sense of ‘I’ from the experience and emotions you will be better able to de-escalate the anxiety creating the space where you can better deal with the concerns you may have about your relationship .