Alternative to making the punishment for getting hit less severe: an "edging" mechanic.
Some bullet hells have a mechanic where putting your ship close to bullets gives you bonus points. In this case you could make it a "haha funny sex joke" by having it so that any time you stay close to a bullet without getting hit, you gain a little in the love meter.
- Just by having the mechanic in place, regular play will give a little extra love, even if you're not trying to because people will get near-misses regardless.
- There could be an achievement for filling the love meter without firing a shot, as well as doing so without dying, if the game needs more achievements.