Songfacts®:

• One of the more straightforward songs in The 1975's canon, this finds Matty Healy totally enamored by his love interest. The 1975 singer struggles to convey his feelings towards her, and when he finally does so, they burst out like a volcanic eruption:
  
  I'm in love with you, I- I- I- I- I-
  I'm in love with you, I- I- I- I- I-
  I'm in love with you, I- I- I- I- I-
  I'm in love with you, I- I- I- I- I
• So who is Matty Healy singing of? It's likely the girl in question is the mixed-race singer-songwriter FKA Twigs, whom he started dating towards the end of 2019. They were together for over two years before calling it off due to "work commitments" in early June 2022. Healy gives us a clue about the identity of his paramour in the pre-chorus.
  
  You show me your
  Black girl thing
  Pretending that I know what it is
  I apologize, you meet my eyes
  
  Twigs' father is Jamaican and she's proud of her Black roots. Healy is so besotted by his fellow musician, he's oblivious to her passionate conversation. The singer told Apple Music the lyric came from a moment when his girlfriend was talking about something that he had no cultural understanding of.
  
  "All I was thinking was, 'I'm in love with you,'" he said. "And maybe I should have been focusing on what it was, but in that moment, I didn't care about anything cultural or political. I just loved her."
• Matty Healy repeats the song's title a total of 24 times.
• Healy co-wrote "I'm In Love With You" with his usual songwriting partner, The 1975 drummer George Daniel. The pair also co-produced the track with Jack Antonoff (Taylor Swift, Lana Del Rey, Florence + the Machine, Lorde).
• The 1975 debuted "I'm In Love With You" during a 16-song set on August 20, 2022 at the Zozomarine Stadium and Makuhari Messe in Tokyo. The concert was the first of the two shows they played as part of the Japanese Summer Sonic Festival.
• Samuel Bradley directed the whimsical black-and-white video where a clown vainly chases the elusive girl of his dreams. A dancing, guitar-playing Healy and his 1975 bandmates perform the song in the middle of the road accompanied by Phoebe Bridgers.
  
  "There's a real desire now in art for remarkable stuff that takes as little technology as possible, because everyone can make something with technology, and it's so easy to not do loads of practice," Healy told Pitchfork. "Like this video that I just did - you don't need to put as much effort as we put in. It's basically part two of the 'Change of Heart' video, where I was a clown and trying to chase this girl and get her back. But in order to exaggerate that idea, I had to exaggerate the world, and my dancing had to be better. So I was in dance rehearsals for a week, and she was on wires, flying. It's very Buster Keaton, Fellini, dreamy. It was a lot of work. But we wanted to something that's really impressive instead of leaning into technology all the time."
• The 1975 sometimes get carried away in the studio and come up with complex parts they can't replicate in concert. "In the studio, we never really think, 'Can we play this live?,' lead guitarist Adam Hann told Total Guitar magazine. "That's not a thing we consider whatsoever."
  
  At one point towards the end of this song, there are nine guitar parts going simultaneously, which the band obviously can't duplicate live. "The balance is clever, so it doesn't sound like that," Hann said, "but when you open up the stems and think, 'what are we gonna play?' you have to pick three parts from these nine to work on."
• The band performed this song and "Oh Caroline" when they were musical guests on the March 11, 2023 episode of Saturday Night Live.