Likewise, is it weird for a 16 year old to date a 18 year old?
16 & 18 is not necessarily bad, but keep in mind the older person in the relationship is at risk legally until the younger is an adult. Sex is legally prohibited, but then so is pot and alcohol.
Secondly, can an 18 year old be with a 15 year old in Texas? Any sexual contact between a 15 year old and an 18 year old is illegal. See Texas Penal Code Section 22.011 - Sexual Assault and Section 21.11 - Indecency with a Child. Age differential MAY be an issue, but it is best not to go through the process, Wait.
Similarly, can a 19 year old date a 16 year old in Texas?
Under Texas law, it is not statutory rape if the two individuals are married at the time or if they are within three years of each other, so long as they are both over 14. For instance, this protects a 19-year-old who has intercourse with a 16-year-old.
Is it weird for 18 to date 15?
There's not really anything illegal about the 18 year old 'dating' a 15 year old. However, it gets to be a legal problem if 'dating' means 'having sexual relations. ' If you are having sex with this 18 year old guy, then he is committing a felony offense that could make him a sex offender.