mariaB, what are you actually wanting to do? Presumably live with your husband! But he is in the UK and is clearly exercising his Treaty Rights in the UK.
You have the same Treaty Rights as your husband but you need an EEA Family Permit in your passport to prove it. By the way, where is your passport? With the Irish immigration authorities?
Given your reasonable hesitation about returning to your country to apply for your EEA Family Permit your best hope is to apply for that at the British Embassy in Dublin. The hope is that they will be prepared to entertain the application given your asylum seeker status in Ireland. I don't think it is certain that they would be prepared to entertain the application, but can merely hope that they will.
Your marriage! Can I ask how the two of you met? What was the sequence of events? And how come you ended up in Ireland claiming asylum there?
Earlier I asked :-
Do appreciate that wherever you apply there will be the need to prove that the relationship is real, and not a "marriage of convenience". Blunt question! How will you go about proving that? What evidence do you have to show that the relationship is real?
It really would be useful to have your comments about that. The reason I ask is that unless you prove the marriage is real there is a great danger that the British Mission dealing with your EEA Family Permit application will conclude that your marriage is a "marriage of convenience". It is essential that you and your husband prove that the marriage is very real!
I make that comment because one of the main reasons why the UK introduced its legislation regarding the need for many non-EEA nationals to obtain a Certificate of Approval to Marry was because of Portuguese nationals having a reputation for being prepared to enter into a marriage of convenience. Accordingly you and your husband need to provide very good proof that the marriage is real.
What was the marriage date? When did you and your husband last see each other face-to-face?