The decision to purchase and run Love Bomb is already the setting of an intention to radiate love and positivity.
For that matter, every subliminal program that you have ever played has represented an intention on your part to cultivate and express particular attitudes and states of mind.
As to the specific question of ‘forcing’:
‘Forcing’ is not mentioned in that quote.
Making choices about our mental orientations is a natural process that we are all doing everyday and all day. It’s literally the biological function of your brain’s Prefrontal cortex.
Your body wants to urinate and you say, ‘Wait until we get to the bathroom’.
You’re in a meeting and your favorite song pops into your head. You say, ‘let’s wait until we’re in the car or at karaoke to belt that one out.’
You’re driving in said car and you feel sleepy, and you say, ‘Let’s stay alert and not crash the car. We’ll take a nap when we get home.’
And so on and so on.
You make choices about how to best direct your attention, your cognitions, your emotions all the time.
Now, to respect your original point, those choices should definitely respect the boundaries, needs, and limits of your body and mind. We’re not trying to abuse or ‘force’ anything. You should respect your nature and your joy and your safety; and not make choices that twist yourself or bend yourself in destructive ways.
But don’t pretend that you’re not making choices every day. It’s a burden and it’s also a super power. And ultimately, it’s just a normal part of being a higher-order lifeform. (Octopuses, cows, crows, chimpanzees, and dogs are all doing it too in their own ways and to their own degrees.).
Also, remember that love includes self-compassion and the care that you give to yourself on an ongoing basis. Love, respect, and properly manage your own flow of needs, sensations, and states of being.
This will ensure that you find and keep the right balances, and that you do not force anything.