What the Bible clearly says
Angels are real personal beings who serve God and carry out his purposes. Hebrews calls them ministering spirits sent to serve those who will inherit salvation (Hebrews 1:14). That description tells us something central about them: their identity is tied to worship, service, and obedience to God, not to human family life.
When Jesus answered a question about resurrection, he said that people in the resurrection neither marry nor are given in marriage, but are as the angels of God in heaven (Matthew 22:30). He was not giving a full explanation of angel biology. Still, he does connect angels with a life that does not involve marriage.
Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation?
Why angels often seem male
In several Bible accounts, angels who appear in human form are described as men. Abraham receives three visitors at Mamre, and two angels later arrive at Lot's home in Sodom (Genesis 18:2; Genesis 19:1). At Jesus' empty tomb, the women see a young man clothed in a long white garment (Mark 16:5). Gabriel also appears to Daniel as a man (Daniel 9:21).
The KJV commonly uses masculine pronouns for individual angels, such as Gabriel. Their names and the way they appear are therefore masculine in these stories. But an appearance in a human form does not necessarily settle whether angels possess biological sex as humans do.
For in the resurrection they neither marry, nor are given in marriage, but are as the angels of God in heaven.
A picture is not always a definition
Scripture uses visible pictures to help people recognise heavenly messengers. An angel may look like a man because that is how God chooses to make the messenger understandable in that moment. The men at the tomb frightened the women, yet their message pointed them back to Jesus' own promise that he would rise again (Mark 16:6-7).
There is also an unusual vision in Zechariah involving two women with wings (Zechariah 5:9). The passage is part of a symbolic vision and does not call these figures angels. It shows why we should be careful: not every winged figure in biblical imagery gives us a straightforward description of an angel's nature.
Hold the question with humility
It is fair to say that the Bible usually portrays angels in masculine terms. It is not fair to insist that they are male in exactly the same bodily sense as human men. The Bible's main concern is not their sex, but their allegiance. Faithful angels praise God and do his will, while rebellious angels stand against him (Revelation 5:11-12; Jude 1:6).
So you don't need to force an answer where Scripture stays quiet. Let the question draw you towards what angels themselves point to: God's holiness, his care, and the good news of Jesus. Keep reading the passages in context, and let the clearer parts of Scripture guide the less clear ones.
And I beheld, and I heard the voice of many angels round about the throne and the beasts and the elders: and the number of them was ten thousand times ten thousand, and thousands of thousands; Saying with a loud voice, Worthy is the Lamb that was slain to receive power, and riches, and wisdom, and strength, and honour, and glory, and blessing.