if you both are serious about this and rilly want to be together. you can still travel to other contries and get married but!! dont come back to qatar. they will force you to divorce and you will be banned from entering qatar. and if you are (Christian - Jewish) you can still marry him without converting your religion. abaya and hijab is upto u as a personal choice and upto your husband as well (i'm not saying its not required but everyone's free to choose his lifestyle and religion) so its bout u guys only u can decide if u wana do it or not.
wish u luck

(((God has created the man kind Free, why do we Enslave ourselves?)))---(((Only God can Judge me)))---(((Don't mess with me unless you'r Ready to Bleed)))