thank you for sharing your question with the Wefugees Community!
First of all, congratulations on your upcoming wedding!
To answer your general question: Yes, you can get married as an asylum seeker. You can do it in Germany if your husband wants to relocate to Germany. If you get married, your marriage will also be accepted in the rest of Europe and even beyond. To get married in Germany you will need some documents such as your passport, your birth certificate and in general a so called "Ehefähigkeitsbescheinigung" or "Ledigkeitsbescheinigung" from your home country (it´s a kind of proof of your home country that you aren´t married already). For the marriage you will have to go to the "Standesamt" (registry office) close to you. They will also tell you about the documents they need from you.
I hope this answer was helpful. Please don´t hesitate getting back to the Wefugees Community if you have further questions!
All the best
Note: Please keep in mind that we can´t provide qualified legal advice via the internet and that any information given can´t replace such legal advice.