First of all, my sympathies to you and your BF. Also some words of optimism: His injuries sound about like those my husband suffered when a driver pulled a left turn right in front of him. My DH has healed, is back on his bike, back to trekking up on mountain tops, etc. Yes, there are some lasting effects (scars, one shoulder slightly smaller than the other and with somewhat less mobility) but the nightmares are gone and he's back to a normal level of activity. In fact, the recovery went remarkably fast.

That said, I definitely agree that you should contact a lawyer, as well as your insurance company. The other driver and his insurance company should be covering all your medical expenses (including rehab/PT/massage therapy/whatever ... and including those covered by your insurance), all lost wages (including those picked up by your BF's employer as sick leave), all material costs (clothes, helmet, bike, transportation costs for visits and follow-up appointments ... check with a lawyer and keep receipts for everything that should be covered. This may also be a matter for negotiation in the final settlement. For instance, my DH was asked what tasks were more difficult now that he has restricted range of motion in his right arm. That resulted in his getting a lump sum for future house painting tasks that he may not be able to do on his own any more, plus enough for a motorized mower since it's harder for him to haul the mower up our steep lawn.), AND a good sum for "pain and suffering".

Note too that at least some insurance companies won't pay out anything until the final settlement. Depending on your financial and insurance circumstances, this can put severe pressure on you to settle early. Try to make arrangements so that you can wait it out until you're sure you know all the physical, psychological and monetary costs that you'll be facing.

Do NOT feel guilty about getting the settlement you're owed here. This is NOT about "milking" the system. This is about the other driver (and his/her insurance company) taking responsibility for the very real losses his/her recklessness has caused.