I'm glad you asked and I'm high on caffeine and resentment
They are three main theories for independence:
Constitive theory:
Under this theory Somaliland needs recognition from a state to be accepted as State under International law. Since it doesn't have recognition Somaliland fails to meet the criteria and even if it did have one or more state, the constitutive theory would mean that Somaliland would not be a state for other countries unless they recognize it.
This theory predominated but has since then declined in favor of declarative theory.
Declarative theory:
Under declarative theory Somaliland doesn't need recognition to achieve Statehood under International law. The criteria are shown in the Montevideo Convention and state that:
A state must have:
1: Defined territory, problems with terrorital disputes
2: Permanent population, only the people, not minorities have a right to self-determination, doubtful if Somaliland fits this category
3: A government, this is proven beyond doubt
4: Enter into agreement with other states and this criteria relates to the external self-determination, which Somaliland does not have, the question then comes do they have a right to it and thereby secession?
Redemial theory:
Under remedial theory secession and acquiring not yet gained external self-determination is possible as a last resort under the safe guard clause in the Montevideo convention. By example if the internal self-determination is denied and atrocities are being committed despite attempts to stop them then and only then can secession be allowed under declarative theory.
Eritrea was denied internal self-determination and thus could have gained independence under remedial theory but instead did under constitutive theory with Ethiopia's consent. Lastly there is Postive theory.
Positive theory:
Positive theory does not unlike remedial theory require injustice and various scholars set different standards but over all Somaliland could achieve independence under this theory, but its impact is limited as constitutive theory and declarative theory are the two main ones.