Suffering from OCD (mental health condition)

Q: I have been diagnosed  with OCD - a mental health condition and I have had it for around 2 years. I have been a mental health patient in the UK for a long time as well and I am also on anti depression medication. At one point in the past, it took me around 60 mins to read a four unit fard
zuhr prayer consisting of surah fatihah and surah Ikhlas. I have also had severe problems with wudu and ghusl. Because my prayers are too long, I have not been able to get a job, or go to University. I don't know if my illness will ever leave me and it has been destroying my chances of earning a halal income-which is wajib upon me. Is it permissible for me with my illness at the time of need so that I can earn a halal income/ study/train to order to earn a halal income to miss: 

the sunnah aspects of the prayer
sunnah prayers
sunnahs of wudu
sunnahs of ghusl

Otherwise I fear it with my health problem, life would be very difficult for me in the future.

Meeting up with a boy on facebook

Q: I have met this guy on facebook. At first we use to chat and just be friends and then one day my parents found out and I stopped talking to  him. After a while I got in contact with him again. I really missed him and realised I was in love with him. Now that I speak to him, he knows I love him and he has asked me to marry him and would I talk to my parents? I don't want to do anything haraam. I have tried to forget him and I couldn't. Is there anyway, advice or duas that I could pray to help me with this. I rally want to marry him and have a halaal relationship.

Substituting the Sunnah Muakkadah with Qadhaa Salaah

Q: A person has excessive (many years) of Qadhaa Salaah. Due to weakness, would it be correct for a person to substitute the Sunnah Muakkadah
before/after each Salaah with Qadhaa Salaah? For example, at the time of Fajr, instead of performing two Rak'aats of Sunnah Muakkadah, a person makes intention and performs two Rak'aat of Fajr Qadhaa. Or at the time of Zuhr, instead of performing four Rak'aat of Sunnah Muakkadah, a person performs four Rak'aat of Zuhr Qadhaa. Would this be correct?