Homosexuality is not about love, it's about sex. There is nothing wrong with a man loving another man, we are supposed to love each other, but love is NOT equal to sex! That goes for heterosexuals as well. Sexual intercourse is designed for 1 male and 1 female who are in the covenant of marriage. The Bible is very clear on that one. Anything else is
the alteration of something from its original course, meaning, or state to a distortion or corruption of what was first intended.
Which is the dictionary definition of perversion.
And the Bible is also very clear on what Love means, both in the specific words it uses and the meaning of the texts describing it. When the bible speaks of love in a positive manner it uses the word agape which is the perfect love of God, of which Christ said : "Greater love has no man than to lay down his life for a friend." (John 15:13) and it is the agape love that is spoke of in 1 John 4:7-8:
1 John 4:7-8 (KJV)
7 Beloved, let us love one another: for love is of God; and every one that loveth is born of God, and knoweth God.
8 He that loveth not knoweth not God; for God is love.
So what does agape look like?
1 Corinthians 13:4-7 (NIV)
4 Love is patient, love is kind. It does not envy, it does not boast, it is not proud. 5 It does not dishonor others, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. 6 Love does not delight in evil but rejoices with the truth. 7 It always protects, always trusts, always hopes, always perseveres.
So now compare that description of real love with sexual contact. They are miles apart. This is not to say that sex is bad, but it is to say that sex has nothing to do with agape. Now the bible does talk about sex elsewhere:
Mark 10:6-9 (NIV1984)
6 “But at the beginning of creation God ‘made them male and female.’ 7 ‘For this reason a man will leave his father and mother and be united to his wife, 8 and the two will become one flesh.’ So they are no longer two, but one. 9 Therefore what God has joined together, let man not separate.”
Now comes the next issue, what about christians loving homosexuals? We are supposed to love them as ourselves, but that doesn't mean we accept the sin. See this question on loving the sinner but hating the sin. Jesus will take you as you are, but you don't get to stay that way! That applies to all sin not just homosexuality, I'm an equal opportunity sin hater.