2 months left on my student visa, can i re-enter UK?

Hi all, I came to UK in 2014 on Tier-4 Student Visa, I got 2 months left in my visa and my education is completed.
I was planning to go back home for 2 weeks to celebrate my brother's wedding.
Can I come back to UK after that??
My fiancee is living in UK who is settled and we already have given notice of our marriage at register office.
Thankyou

You may be denied entry under 321(ii) or 321A(1).