Permanent pal, in textspeak

• Soul sister, slangily
• Favorite pal, in texts
• Pal until the end, for short
• Pal to text "<3" symbols to
• Closest pal, these days
• Really good bud, in brief
• Partner "4 lyfe"
• Fave texting bud
• Closest pal, initially

Wiktionary Word definitions in Wiktionary
n. (context text messaging Internet slang English) (initialism of best friend forever English)