I agree... if you are discussing whether to follow the Mosaic law or not, Galatians 5:13 and Romans 13:8 make it clear that the law is fulfilled in the one command.
However, you are trying to build an argument that "love your neighbor as yourself" can be used against "the one who speaks in a tongue edifies himself". You are about to engage in the fallacy of equivocation. Save yourself the trouble; it's an invalid argument.
I'm not the one equating, that's exactly what Paul is teaching concerning tongues:
1 Cor 12:
7 Now to each one the manifestation of the Spirit is given for the
common good.
8To one there is given through the Spirit the message of wisdom, to another the message of knowledge by the same Spirit,
9to another faith by the same Spirit, to another gifts of healing by that one Spirit,
10to another the working of miracles, to another prophecy, to another distinguishing between spirits, to another speaking in various tongues, and to still another the interpretation of tongues.
1 Cor 13:
4Love is patient, love is kind. It does not envy, it does not boast, it is not proud.
5It is not rude,
it is not self-seeking, it is not easily angered, it keeps no account of wrongs.
6Love takes no pleasure in evil, but rejoices in the truth.
7It bears all things, believes all things, hopes all things, endures all things.
1 Cor 14:
1Earnestly pursue love and eagerly desire spiritual gifts, especially the gift of prophecy.
2For he who speaks in a tongue does not speak to men, but to God. Indeed, no one understands him; he utters mysteries in the Spirit.
3But he who prophesies speaks to men for their edification, encouragement, and comfort.
4The one who speaks in a tongue edifies himself, but the one who prophesies edifies the church.
Self edification was the problem at Corinth. There's no love in self edification and where there's no love, there's no God.