Is it permissible for a woman to break an oath she made concerning future matters such as love and marriage, especially after she falsely swore not to speak to men, and is she required to offer expiation for repeated oaths, and what should she do if she is not financially capable of offering expiation, and will her repentance be accepted after these sins?

Swearing about a future event entails an expiation for an oath (kaffarat yameen) if one breaks it. A single expiation is permissible due to the hardship of multiple oaths. As for swearing falsely about past matters, this is a "ghamus" oath (a false oath taken deliberately to seize someone's right), which is one of the major sins that, according to the preponderant opinion, has no expiation, and one must repent from it. Repentance is also obligatory for laxity in sinful emotional relationships and for abandoning the path of righteousness.