Disclaimer: I don't own The Big Bang Theory and I never will. No copyright infringement intended.
Raj really wishes sometimes that only being Howard's friend was the extent of their relationship. Instead, they tell people they're "just friends". It's true. Raj tries to tell himself he's not in love with his mama's boy of a best friend.
Howard can handle being "just friends" with Raj. None of their friends know why they've been fighting so much lately. He really wishes he could talk to someone (not Raj) about this.
"We're more than just friends," Raj finally admits later that night in bed.
"I love you too," Howard admits. He and Raj are definitely more than friends.
They tell their friends about their relationship the next day.