Dragon Age II relationship with Fenris before the final Battle help please?

[prettyspirals]

I'm in act 3 of dragon age II and pretty much ready for the final battle but i wanted to be in a relationship with Fenris before the end. However, i cant get the final scene with him (the one before the final battle where i have to forgive him for leaving me) unless i have his friendship up to 100% (i almost do i just need a few more points) is there any way i can get the friendship points up before the end???? like any extra missions where i can talk to him or something? I've done all the missions you get by letter but are there extra ones you can do where you talk or make decisions and have a chance to improve relationships? Thanks in advance