Hi DreamerGirl,
I am assuming here. Your bf is from Pakistan, and his visa expired on Feb 19th. What visa did he have initially? Was it student/fiance? Since then he has applied for FLR- when did he submit this application?
I believe you have to apply for Further Leave to Remain (FLR) before the existing visa expires. Otherwise, you have to go home, and reapply from there. Your bf should return home asap - because overstaying a visa is not good for future applications. If it transpires that he applied for FLR before Feb 19th, then he has a valid reason for overstaying (awaiting result of FLR) which will be used in his future application. However, he should now honour the decision and return home.
Please give more information based on these questions. Others here will help more than I can.
