These made up 'sexualities' have no business in the LGB community. The L, G and B (and 'straight' for that matter) are permanent sexual orientations that do not change throughout people's lives. They may be repressed, avoided or denied but they are inescapable and innate modes of desire, intrinsic and universal and observed globally and throughout human existence.

Being asexual is a typical symptom of past abuse or extreme trauma, physical pathology (eg. obesity), common mental ill health (especially depression and anxiety - which are at pandemic levels within modern Western populations) and as such it is highly questionable whether such a state is permanent and innate or is a comorbidity of pathology.

As for 'aromantic' - lol. This is just a trendy social attitude among certain age groups within a handful of Western countries, exposed to the same viral memes on tumblr. And like other social attitudes, there is absolutely nothing intrinsic or universal about it. You may as well state 'being attracted to rich old men with massive bank balances' is a valid sexual orientation - that one at least has a universal pedigree of truth throughout human history.

Adding this nonsense in to the LGB dilutes the core message of equality for same-sex attracted people and actively makes it harder for the LGB in the many socially and politically repressive countries to gain public sympathy and overturn laws which ruin lives.