One pet peeve of mine is when people go on about how much more expressive Greek is than English because Greek has 3 different words for love, while we only have one. There are a few reasons why.
First of all, Greek may have 3 different words for love, but we have more over 10 words for walk (promenade, saunter, mosey, stroll, tour, hike, jaunt, and more if you check out a thesaurus).
Second of all, we also have around 6 words whose basic meaning is love: love, affection, adoration, romance, amour, amity. We have more than that if we start including friendship, obsession, and poetic devices.
Third, the distinction between philos and agape is incredibly overrated. There is not a strong distinction between them. At best, it is possible to say that agape may have been the stronger term, but that isn't entirely definite. Chances are, the distinction was incredibly similar to our words love and adoration. As for eros, take your pick between romance and amour. (Beside, if agape referred to familial love, then why'd they name the city philadelphia)
Fourth, English is a conglomerate language with one of the largest vocabularies. Most of our words derive from ancient Germanic/Celtic, Latin, and Greek. In fact, for most common Greek word, there is at least one (often more) English word that is derived from it.
There is an English word for every idea out there. Separation of Church and state is called disestablishmentarianism. Rambling on and on where your words stop really making sense to the person you are talking to is called logorrhea. Knowing the word you want but not being able to think of it is called lethologica. Piscivorous means fish eating; a bad poet is a poetaster; to cavil is to disagree with something for petty and irritating reasons; a cooling drink to calm a fever is called a febrifuge. If there is one thing you don't mess with English on, it's vocabulary. I mean, come on, we have a synonym for earwax (cerumen).
Sure, English has its flaws. I mean there are more exceptions to the rules of grammar than there are rules of grammar. But English is a powerful language if you learn to tap into your dictionary. We also have a highly versatile grammar as well. So take it from this logophile, and learn to appreciate your native tongue. You'll be amazed at the joy you'll find.