Hi Nymshi! Welcome to AT!!
I may have a different approach to interpreting the shadow side than others, but I'll share my thoughts anyway!!
Consider the symbol of yin/yang, the harmony of masculine and feminine. The white side is the masculine side, the Sun Sign, and the upper/higher chakras (as you called it the "True Self" or perhaps even the "Higher Self"?). The "Shadow" side, is the Feminine side/energy and the lower chakras.
The Shadow side of a person is not a BAD side, it is the other half of that person which makes them a whole and unique individual. It is the side that is often misunderstood, not looked at, pushed aside, swept under the rug or is embarrassing to reveal. This is because the past aeon has been dominated by Sun energy, masculine energy, and people are more comfortable with falling back on logical thinking than relying on their emotions to make decisions.
The Lovers card for me connects to the sign of Gemini which is a very communicative sign. With the Knight of Swords drawn in opposition to this card, I'm wondering if this person has a sharp tongue or may be callous in his/her comments, perhaps cracking a joke to break the tension instead of facing his/her emotions ("shadow" side) out of fear of sounding to mushy or girly. If this is a guy, there's a huge stigma for men that they need to overcome, because they've been taught "not to be such a girl" and express their emotions. The good news is that Gemini's/The Lovers eventually resolve this inner conflict because they're compelled to work towards harmonizing these opposites, though again, with the Knight of Swords indicating age being in their 20's, possibly early 30's, this ability may still be under development.
This card combination is also telling me that this person is sincerely "on the quest for True Love" and they won't stop until they find it. I'd guess this person you're asking about is a male, because the Shadow card (feminine energy) is a Major = looking for the other "half".
I'd be curious to know if this person is a Sagittarius, because Gemini is directly opposite this sign on a natal wheel. If that's not the case, you may find another clue to interpreting this card by knowing what this person's Sun Sign is and looking directly across the Wheel to the sign that represents their astrological "Shadow Side". For example, if they're a Taurus, Scorpio would be their shadow sign. I'd then read Death (Scorpio) and the Lovers card for more information.
Just a few thoughts to consider as I've been doing a lot of shadow work with my own signs over the past few years. Hope it helps!