It's very hard for me to climax during sex

Not that many woman do actually climax just from intercourse alone so your not different or anything.
Foreplay ranges from just kissing and touching of the erogenous zones down to actual stimulation of the clitoris or vagina.
Just teach your bf what you do when you masturbate alone.
Hope this helps :-)

When I want to give my wife a really great time I slide her to the edge of the bed while I sit on a foot stool facing her delicious honey pot. If we have time I get a bowl of warm water and wash her inner thighs and vulva carefully with feeling. Then I begin kissing her inner thighs and moving up to her outer lips and belly. Then I spread the lips and begin kissing what I came there for. Licking and sucking everything and sticking my tongue as far into her vagina as it will go. She has a hidden clit, it is underneath the skin and can't be found, so I can't lick and suck her love button. If yours is available for his pleasure and yours be sure to have him give it plenty of loving. My wife was never able to climax from insertion so that is how I gave her what she needed and it usually resulted in me having a very pleasurable eruption before I got inside. After that I could bring her almost there again and insert my penis so we could both have another climax and with experience we were able to time it so we came together most times.

Thank you very much, I thought there was something wrong with me bcus of the fact that I couldn't climax from insertion. Do you know any tips I can tell my bf to help him last longer in bed? Bcus After hes done im always the one wanting more but he becomes sore after ejaculating 3 times in about a hour of intercourse