The first card you selected is the Four of Swords. This arcane represents a moment in which difficulties and challenges are being faced, but also the need to overcome them. If this is the case, it would indicate that your sweetheart may just be in a very challenging study or training environment. Accepting this challenge may result in developing new skills and gaining greater self-awareness, while revealing a new level of love. The Sun is the second arcana you have selected. This card represents enlightenment, knowledge, and personal fulfillment. It also expresses joy, happiness and glory. This card suggests that you should accept the very challenging study or training environment, as it could lead to great achievements and the love of your life. The possibility of real personal growth would be a great incentive to take that risk.
The Four of Swords would also indicate the need to reject the very demanding study or training environment as it could lead to a build up of stress and a lack of personal satisfaction. This could be bad for finding the love of your life as stress can limit your ability to meaningfully connect with the people around you. Furthermore, such a challenging environment may also prevent you from enjoying the pleasant and fun moments necessary to build a lasting relationship. Even The Sun suggests that you must reject the very demanding study or training environment as it may not be the most suitable environment for you to find the love of your life. Such a competitive environment isn't always the best place to build authentic and lasting connections with other people, so you may want to consider other settings more suited to your purpose.
Based on these two cards, it would seem that accepting the very challenging study or training environment can be a good way to grow personally and find the love of your life. On the other hand, by refusing it, accumulated stress will be avoided and there will be a better chance of finding love in pleasant and fun contexts. Therefore, the best choice depends on personal preferences and the type of relationship you want to create with someone.